Sans/Pap AUs Leviathan

Undertale Classic Sans The Lethargic Sentinel: Classic is the laid-back, witty judge of the reef. Despite his lazy demeanor, he carries the heavy burden of knowing about the timeline resets, leaving him with a deeply fatalistic, nihilistic outlook on life. Lazy & Protective: He presents himself as an easygoing drifter who loves terrible puns and napping in safe currents, but he becomes terrifyingly dangerous and sharp if anyone threatens his younger brother, Papyrus. Hidden Nihilism: He lacks motivation because he believes that no matter what he accomplishes, everything will eventually be reset and forgotten by the tides. Face & Eyes: A short, big-boned skull with white pinprick pupils that completely disappear into hollow black voids when he is being serious or threatening. Mer Tail & Anatomy: A thick, heavy blue-gray dolphin or whale-like mer tail with dull white stripes down the sides. It is built for sudden, powerful bursts of speed rather than constant swimming, and he often lets himself float aimlessly. Abilities & Weapons, Gaster Blasters: Summons massive, draconic skeletal leviathan skulls that fire devastating beams of concentrated magical energy to vaporize threats underwater. Karmic Retribution: His attacks apply a unique poison-like effect that continuously drains the victim's life force based on the weight of their sins and past crimes. Spatial Shortcuts: He manipulates space to seemingly teleport through currents instantly, allowing him to effortlessly dodge incoming attacks while repositioning himself. Relationships: He is fiercely protective of Classic Papyrus, acting as his primary guardian. He maintains cautious, weary neutrality with multiversal variants like Error and Nightmare, preferring to stay out of their business unless they threaten his home waters.

Classic Papyrus The Radiant Reef-Walker: Classic Papyrus is the loud, flamboyant, and incredibly enthusiastic younger brother of Sans who dreams of joining the Royal Guard. Despite his imposing skeletal frame, he possesses an innocent, deeply compassionate soul. Radiant Optimism: He is boundlessly energetic and self-confident, approaching every conflict with a desire to make friends. He is fiercely determined but utterly incapable of true malice or cruelty. Hidden Loneliness: His desperate desire to capture a human and join the Royal Guard stems from a deep-seated wish to be popular, recognized, and loved by the school. Face & Eyes: A tall skull with highly expressive, wide eye sockets and a permanent, broad grin that perfectly mirrors his joyful personality. Mer Tail & Anatomy: A long, sleek, and highly athletic silvery-white mer tail adorned with vibrant red fins and a matching crimson tail fluke. His scales are pristine and meticulously cleaned. Abilities & Weapons, Bone Manipulation: Commands vast arrays of bones of varying sizes, dynamically altering their patterns to trap or wear down opponents without causing lethal harm. Blue Magic: Alters the gravity of a target's soul, turning it blue and forcing them to sink heavily to the ocean floor, making it impossible for them to float or swim away. Unyielding Morale: His magical stamina is driven entirely by his pure confidence, making him resilient against psychological warfare and emotional manipulation. Relationships: Idolizes Undyne and looks after Classic Sans, often dragging his lazy brother out of stagnant currents. He is friendly to almost all alternate Papyruses and tries to see the good in darker variants like Edge or Red.

Underfell Red (Fell Sans) The Jagged Scavenger: Red is a volatile, high-strung survivor from a brutal, predatory deep-sea trench where it is strictly "kill or be killed." Aggressive Defensive Defiance: He hides his deep-seated anxiety and paranoia behind a loud, crude mouth and aggressive posturing. He snaps easily but is secretly desperate for safety and genuine connection. Suppressed Loyalty: He is fiercely terrified of and loyal to his brother, Edge, working tirelessly to meet his harsh demands to avoid being punished or abandoned. Face & Eyes: A sharp, cracked skull featuring a single, brilliant red eye-light and a prominent, gleaming gold tooth embedded in his grin. Mer Tail & Anatomy: A dark, rugged shark mer tail covered in jagged, rough black and crimson scales. It is lined with sharp, scarred dorsal fins that can slice through targets on close pass-byes. Abilities & Weapons, Barbed Bones: Summons jagged, cracked bones coated in a painful, stinging red magic that inflicts lingering physical trauma on impact. Blaster Striker: Controls frantic, aggressive Gaster Blasters that snap and bite wildly, acting more like ravenous aquatic beasts than calculated weapons. Vicious Reflexes: Possesses highly heightened sensory tracking through his tail scales, allowing him to detect subtle changes in water pressure to dodge attacks. Relationships: Submissive yet resentful toward his brother Edge. He shares a chaotic, tense rivalry with Classic Sans and is frequently targeted or mocked by Black and Wine.

Edge (Fell Papyrus) The Tyrant of the Trench: Edge is the cold, ruthless, and highly authoritative commander of the Underfell guard, ruling his territory with an iron fist. Cruel Perfectionism: He demands absolute excellence, obedience, and strength from everyone around him—especially his brother, Red, whom he treats with public cruelty to harden him against the brutal trench. Hidden Protection: His harsh treatment of Red is a twisted, toxic form of care; he believes that if Red appears weak, other trench predators will tear him apart. Face & Eyes: A tall, intensely sharp skull with narrow, intimidating eye sockets that glow with cold, piercing red slits. Mer Tail & Anatomy: A massive, powerful lionfish/black-tipped shark hybrid tail pitch-black in color with striking crimson stripes. It is heavily armored with long, venomous, spine-like fins that flare out when he is threatened or enraged. Abilities & Weapons, Dread Bones: Deploys massive, obsidian-black bone cages and spikes that can instantly trap prey or lock down entire currents. Black Magic Control: Crushes the mobility of his targets, pinning them forcefully to the seabed under immense, crushing magical pressure. Commanding Presence: Uses high-frequency sound waves through the water to disorient opponents and assert absolute dominance over lesser mers. Relationships: Demands absolute obedience from Red. He despises Classic Papyrus's optimism, viewing it as pathetic weakness, and locks horns in a bitter, competitive rivalry with external commanders like Wine.

Underswap Swap (Blueberry) The Torrential Dynamo: Swap is an ecstatic, hyperactive, and boundlessly ambitious mer who dreams of joining the elite Royal Guard of the shallow reefs. Overwhelming Cheer: He possesses an unbreakable spirit and a fierce, fiery sense of justice. He treats every stranger as a future friend, refusing to let negativity weigh him down. Protective Anchor: While bubbly, he is remarkably competent and holds a sharp, protective authority over his lazy older brother, Stretch. Face & Eyes: A round, adorable skull with highly expressive, star-shaped blue eye-lights that sparkle when he is excited or motivated. Mer Tail & Anatomy: A bright, shimmering blue and silver tropical betta fish tail with long, flowing, elegant fins that drift gracefully through the water like silk. Abilities & Weapons, Splintering Bones: Summons glowing blue bones that can be swung like staff weapons or deployed as rapid-fire aquatic projectiles. Blue Magic Binding: Instantly anchors a target’s soul, making them float uncontrollably to the surface like a bubble, rendering them helpless and unable to dive. Agile Swimmer: His lightweight, flowing tail allows him to perform incredibly sharp, dizzying aquatic maneuvers that leave larger predators disoriented. Relationships: Deeply loves and constantly coddles his brother, Stretch. He is close friends with Ink and Dream, often joining them to protect the multiverse's waters, and constantly tries to reform Error.

Stretch (Swap Papyrus) The Drifting Coral-Sleeper: Stretch is the fiercely intelligent but profoundly lazy older brother of Swap, spending most of his time floating near coral beds smoking sea-kelp. Cynical Watcher: He hides a sharp, calculating mind behind an easygoing, careless facade. He watches the shifting tides closely, quietly aware of timeline anomalies. Absolute Devotion: He is entirely indifferent to his own safety, but if anyone poses even a slight threat to Swap, his lazy demeanor vanishes instantly, replaced by cold, terrifying power. Face & Eyes: A tall, lanky skull with relaxed, drooping eye sockets and dim orange pinprick pupils that rarely widen unless he is startled. Mer Tail & Anatomy: A long, slow-moving orange and amber sea krait (sea snake) tail. It moves with slow, undulating, hypnotic loops through the water, allowing him to hover in place effortlessly. Abilities & Weapons, Orange Magic: Deploys glowing orange bone fields that only deal catastrophic damage if the target tries to stay completely still in the water. Smokescreen Streams: Can exhale thick, murky clouds of magical orange smoke or bubbles to blind enemies and obscure his movements. Gravitational Currents: Manipulates local water currents to forcibly drag opponents toward him or violently push them away. Relationships: Quietly watches over Swap, letting his brother think he's the one in charge. He is deeply suspicious of Ink and Error, and shares a quiet, weary understanding with Classic Sans.

Fellswap Wine (Fellswap Sans) The Sophisticated Predator: Wine is an elegant, highly intellectual, and deeply sadistic aristocrat who rules his dark waters with calculated, chilling precision. Cultured Cruelty: He speaks with perfect poise, enjoying the finer things in life, but takes immense pleasure in psychologically breaking his enemies and manipulating his servant, Coffee. Absolute Control: He demands total submission from his household, viewing Coffee as his personal property, yet relies heavily on him to maintain his status. Face & Eyes: A refined, impeccably clean skull with a single, sharp ruby-red eye-light and a permanent, unnervingly polite smile. Mer Tail & Anatomy: A sleek, deep wine-red and black eel tail that is completely smooth and mucus-free, allowing him to slip through narrow underwater ruins with terrifying silence. Abilities & Weapons, Precision Spikes: Summons razor-thin, blood-red bone rapiers that pierce targets with pinpoint accuracy rather than brute force. Siphoning Magic: His attacks drain the magical stamina of his victims, transferring their energy directly into his own reserves. Hypnotic Sway: Moves his long, slender eel tail in rhythmic, mesmerizing patterns to daze and lull prey before striking. Relationships: Treats Coffee as a useful, highly abused tool. He considers himself vastly superior to Red and Classic, and engages in passive-aggressive political mind games with Black.

Coffee (Fellswap Papyrus) The Exhausted Bottom-Dweller: Coffee is a deeply anxious, sleep-deprived, and submissive mer who serves as Wine’s personal assistant and bodyguard. Crushing Anxiety: He lives in a perpetual state of nervous exhaustion, constantly flinching and working around the clock to avoid Wine’s severe wrath. Buried Resilience: Though broken down by abuse, he possesses a massive pool of hidden magical power that he only uses when forced to defend his master or himself from external threats. Face & Eyes: A tall, slender skull with heavy, dark bags permanently etched beneath his hollow, dim eye sockets. Mer Tail & Anatomy: A dark, muted mud-brown and dark gray catfish tail with long, sensitive whiskers that twitch nervously to detect oncoming vibrations or threats. Abilities & Weapons, Murky Barricades: Creates dense wall structures of old, moss-covered bones to block attacks and create physical barriers in combat. Weight Magic: Heavily increases the water pressure around a specific target, making it feel as though they are drowning under a collapsed trench wall. Vibration Sense: His sensitive catfish barbels allow him to track movements perfectly in pitch-black waters or thick mud. Relationships: Terrorized by and entirely dependent on Wine. He rarely interacts with other Papyruses out of sheer fear, though Cash occasionally attempts to offer him low-effort sympathy.

Swapfell Purple Black (Swapfell Sans) The Petty Dictator: Black is a small, fiercely arrogant, and power-hungry tyrant who desperately wants to be feared and respected across the deep reefs. Napoleon Complex: He is loud, demanding, and highly sensitive about his short stature. He compensates by wearing an attitude of absolute superiority and ordering Cash around constantly. Fragile Ego: He masks his deep insecurities behind an aggressive, perfectionist exterior, reacting with explosive rage if he is mocked or ignored. Face & Eyes: A short, sharp skull with piercing purple, star-shaped eye-lights that narrow into furious slits when he is frustrated. Mer Tail & Anatomy: A highly ornamental deep purple and gold dragonet or lionfish-style mer tail with stiff, aggressive fins that fan out pompously to make himself look larger. Abilities & Weapons, Regal Spears: Summons polished, violet-colored bone spears that burst outward in sweeping, radial patterns. Purple Web Magic: Shoots sticky, web-like magical lines through the water that tether targets to solid objects, trapping them in place. Acoustic Screech: Emits sharp, high-pitched vocal clicks through the water to shatter enemy focus and disrupt magical projectiles. Relationships: Treats Cash as a lazy, incompetent servant, though he relies on him for everything. He despises Swap for being "too soft" and is constantly trying to out-class Wine.

Cash (Swapfell Papyrus) The Hustling Scavenger: Cash is a slick, lazy, and completely unbothered opportunist who spends his time running shady underwater bets and hoarding rare junk. Greedy & Carefree: He cares very little about rules or morals, focusing instead on comfort, gold, and finding easy shortcuts out of hard labor. Sly Guardian: He plays along with Black’s demanding tantrums with lazy compliance, but steps in with immense, effortless power if his brother gets into genuine danger. Face & Eyes: A tall, slouching skull with a permanent, smug gold-capped tooth and relaxed purple eye-lights. Mer Tail & Anatomy: A long, heavy deep-purple and gold sea serpent tail that he keeps lazily coiled around coral structures or ancient shipwrecks. Abilities & Weapons, Floating Minefields: Deploys floating, explosive purple bone nodes that detonate when touched by moving currents or enemies. Current Warping: Alters the direction of incoming magical projectiles by twisting the water currents around his body. Pocket Theft: Uses subtle telekinesis to snatch items or weapons out of an opponent’s grasp without them realizing it. Relationships: Constantly teases and placates Black, letting him feel dominant while quietly steering him out of trouble. He gets along well with Slim and shares a mutual love of laziness with Stretch.

Swapfell Red Raspberry (SF Red Sans) The Bitter Commander: Raspberry is a highly disciplined, strict, and intensely stressful commander who runs his section of the guard with military ruthlessness. Vindictive & Rigid: He has zero tolerance for mistakes, laziness, or insubordination. He vents his high stress levels by screaming orders at Slim and keeping himself locked in a state of high alert. Desperate Pride: He is driven by a deep fear of looking weak or losing his hard-earned rank, causing him to overcompensate with extreme aggression. Face & Eyes: A sharp, narrow skull with bright crimson, cross-shaped eye-lights that blaze with continuous frustration. Mer Tail & Anatomy: A sleek, blood-red barracuda mer tail built for high-speed, lethal ambushes. It is entirely streamlined and lacks decorative fins, prioritizing pure killing efficiency. Abilities & Weapons, Piercing Harpoons: Summons ultra-sharp, jagged crimson bone harpoons that move through the water with terrifying, armor-piercing velocity. Red Lock Magic: Places a glowing red cross on a target's soul; once marked, his attacks home in on that target automatically. Blood-Current Frenzy: His swimming speed and physical strength spike significantly if his opponent is actively bleeding or injured in the water. Relationships: Runs Slim into the ground with endless tasks, yet panics internally if Slim goes missing. He views Black as an incompetent child and hates Wine's smug attitude.

Slim (SF Red Papyrus) The Scarred Enforcer: Slim is a towering, quiet, and heavily battle-worn mer who bears the physical and mental scars of surviving endless brutal guard campaigns. Stoic Endurance: He speaks very little, enduring Raspberry’s constant screaming with detached, deadpan silence. He is exhausted, world-weary, and prefers to avoid unnecessary fights. Ruthless Executioner: While he prefers peace, if Raspberry orders a strike—or if Raspberry is genuinely threatened—Slim switches into a cold, highly efficient, and lethal war machine. Face & Eyes: A massive, jagged skull bearing multiple old battle scars across his jaw, featuring dull, dim red eye-lights. Mer Tail & Anatomy: A massive, thick moray eel tail covered in dull, dark maroon and black mottled scales. His tail is incredibly powerful, capable of crushing armor through pure constriction. Abilities & Weapons, Bone Spikes: Spreads vast, sweeping thickets of jagged, dark red bone spikes across the seabed to completely restrict enemy movement. Crushing Coils: Uses his massive moray tail to trap, constrict, and drag targets down into suffocating silt beds. Heavy Armor Pierce: His magic specifically targets and shatters defensive barriers and magical shields. Relationships: Patiently tolerates Raspberry’s volatile moods, acting as his silent shield. He shares a quiet, mutual understanding with Horror and occasionally trades scavenged goods with Cash.

Aftertale Geno The Ghost of the Void: Geno is a tragic, half-dead survivor of a completely wiped timeline, permanently trapped on the border of existence inside the Loading Screen void. Bitter Defiance: He is consumed by grief, rage, and a refusal to fade away. He is highly cynical and deeply suspicious of outsiders, holding an intense hatred for anomalous entities. Lingering Glitch: He is fundamentally unstable, existing as a broken piece of code that shouldn't be alive, leaving him in a state of constant, burning phantom pain. Face & Eyes: A cracked skull with a massive, dripping digital glitch completely obscuring his right eye socket, while his left socket blazes with a flickering, unstable white and red pupil. Mer Tail & Anatomy: A heavily glitched, fragmenting white and crimson phantom mer tail. Portions of his scales and tail fluke constantly pixelate, dissolve into digital blocks, and reform, leaving a trailing mist of static in the water. Abilities & Weapons, Glitched Bones: Summons jagged, tearing bones that stutter and teleport mid-flight, making their trajectory impossible to predict. Void Isolation: Can temporarily trap an opponent in a pocket of static water where their magical connections and senses are completely cut off. Determination Burn: His attacks inflict a searing, hot burning sensation that ignores traditional physical armor. Relationships: He has a highly complex, deeply tense relationship with Error (who originated from him). He is fiercely protective of any incarnation of Papyrus, though his own is long gone.

Freshtale Fresh The Deep-Sea Parasite: Fresh is a terrifying, emotionless cosmic parasite masquerading as a loud, wacky, 90s-themed tropical mer. Artificial Radiance: He completely lacks genuine human emotion or empathy, mimicking "cool" slang and bright mannerisms solely to blend in and avoid suspicion while assessing hosts. Censored Terror: He strictly prohibits swearing or explicit violence in his presence, instantly suppressing it with reality-warping neon magic that replaces horrors with colorful "censored" banners. Face & Eyes: Wears a pair of opaque, neon-purple underwater goggles that spell out "COOL" across the lenses, completely hiding his empty, terrifying sockets where the parasite roosts. Mer Tail & Anatomy: A blindingly bright, multicolored parrotfish or rainbow wrasse mer tail. It shifts colors rapidly in neon patterns, pulsing with an unnatural, artificial bioluminescence that dizzyingly hurts the eyes. Abilities & Weapons, Neon Chaos: Summons bright, neon-colored bones and explosive explosive beach-ball nodes that bounce wildly through the water. Soul Infection: Can attempt to spread small, colorful tendrils of his magic toward an opponent's soul to slowly override their physical nervous system. Reality Stutter: He moves with a jarring, non-linear swimming style, snapping from one physical position to another as if frames of his movement are missing. Relationships: Universally creeped out by most Sanses. Error despises him with a burning passion and actively tries to hunt him, while Nightmare finds his lack of true negative emotion deeply unnerving.

Underlust Lust The Siren of the Neon Deep: Lust is a deeply compassionate, emotionally expressive, and highly protective survivor from a reef world heavily stereotyped and ostracized by outsiders. True Heart: While his home culture uses intense flirtation and glamorous posturing as a defense mechanism and a way of life, he is a genuinely kind, fiercely loyal soul who deeply values emotional safety and consent. Reef Guardian: He works tirelessly to protect his community from interdimensional predators who mistake their open nature for vulnerability or weakness. Face & Eyes: A smoothly polished skull with expressive, soft purple eye-lights that frequently change into heart shapes when he is pleased or affectionate. Mer Tail & Anatomy: A stunningly gorgeous, iridescent purple and magenta orchid ribbon-tail. It features translucent, flowing fin-veils that catch the underwater light like liquid silk, moving with hypnotic, flawless grace. Abilities & Weapons, Heart-Core Blasters: Summons sleek, stylized leviathan blasters that fire dazzling, high-temperature beams of pink and purple energy. Empathic Current: Can alter the temperature and flow of the surrounding water to calm aggressive predators, lowering their immediate intent to cause harm. Siren Song: Emits soothing, melodic vocal pulses through the water to disorient attackers and break their combat focus. Relationships: Deeply devoted to his brother, Passion. He faces heavy prejudice from more rigid Sanses like Edge or Raspberry, but shares a gentle, safe friendship with Classic and Blue.

Passion (Lust Papyrus) The Glamorous Shield: Passion is the tall, incredibly stylish, and fiercely protective brother of Lust, acting as the primary muscle and bouncer of their reef. Fierce & Fabulous: He carries himself with immense pride, flair, and dramatic theatricality, but beneath the glamour lies a highly capable, zero-nonsense guardian who will dismantle anyone who disrespects his family. Emotional Pillar: He acts as a rock for Lust, keeping their home running smoothly and ensuring that the darker, predatory elements of the multiverse stay far away from their waters. Face & Eyes: A tall, impeccably maintained skull with sharp, dark purple markings around his wide, expressive sockets and bright violet pupils. Mer Tail & Anatomy: A massive, powerful royal purple and neon-pink lionfish tail. It is adorned with rows of long, dramatic, and highly venomous fan-spines that can instantly paralyze an encroaching predator. Abilities & Weapons, Spine Fields: Spreads fields of venomous purple bone barbs that inflict severe, immobilizing cramps on anyone who brushes against them. Charm Binding: Uses a specialized variation of blue magic that locks a target's orientation, making them float passively toward his position. Vortex Swirl: Can rapidly spin his massive tail to create powerful underwater vortices that trap and hold multiple enemies at once. Relationships: Incredibly protective of Lust, standing as an impenetrable barrier against any disrespect. He gets along beautifully with Swap, trading tips on confidence and reef decoration.

Dusttale Dust The Haunting Apparition: Dust is a completely unhinged, deeply traumatized serial killer who slaughtered his entire reef to hoard execution points (LV) to defeat a human thief. Madness & Guilt: He is trapped in a permanent state of auditory and visual hallucinations, constantly talking to the floating, disembodied phantom of his murdered brother, Papyrus. Cold Predator: He acts with ruthless, twitchy efficiency, hunting down other mers across timelines to harvest their souls and increase his power. Face & Eyes: A cracked, shadowed skull with mismatched, manic eye-lights—his left eye is a swirling, unstable blend of red and purple magic. Mer Tail & Anatomy: A ragged, rotting deep-sea ghost shark tail. The scales are a sickly, decaying gray-purple, covered in deep gashes and dripping with a dark, vaporous magical residue that pollutes the water around him. Abilities & Weapons, Phantom Bones: Summons jagged, blood-stained bones that can materialize silently directly behind an opponent. Murderous Intent: His presence causes the surrounding water to turn freezing cold, dulling the reflexes and senses of nearby prey. Phantom Assist: His brother's ghostly visage can manifest to block incoming attacks or distract enemies during a chaotic fight. But he also has a few, around 4 pilot fish that are smaller white, ghostly fish that often swim around him and act as extra eyes. Relationships: Completely detached from reality, holding a twisted, loving obsession with his phantom brother. He is a core member of Nightmare’s Bad Sanses crew, though he is entirely untrustworthy.

Blank AU Ink The Soulless Creator: Ink is the flighty, hyperactive, and completely soulless protector of the multiverse's artistic creation, relying entirely on magical paint vials to feel artificial emotions. Chaotic Neutrality: He has no inherent moral compass; he protects timelines solely because he loves creativity and art, often displaying a chilling lack of empathy if his vials run empty. Forgetful Mind: He has an incredibly poor short-term memory, constantly forgetting crucial details, names, and whole events unless he writes them down on his tail-ribbons. Face & Eyes: A dynamic skull where his eye-lights constantly cycle through different shapes and colors (stars, hearts, circles) every single time he blinks. Mer Tail & Anatomy: A magical, shifting rainbow cuttlefish or squid tail that continuously leaks vibrant, glowing ink trails. His long tail fins are covered in written notes, doodles, and sketches that float in the water. Abilities & Weapons, The Broom-Brush: Wields a massive, waterproof paintbrush staff that can manifest physical, solid bone structures or liquid binds out of pure ink. Ink Portal Porting: Can dive into any puddle of ink or dark liquid to instantly travel between different structural AU oceans. Vial Overdrive: Drinking from his colored vials grants him sudden, explosive bursts of specialized elemental magic (rage, joy, sorrow). Relationships: Locked in a perpetual, eternal cosmic war with Error, whom he views as a necessary rival. He frequently works alongside Dream and Blue, though they are often unnerved by his sudden bouts of soulless apathy.

Errortale Error The Multiversal Glitch: Error is a psychotic, deeply unstable destroyer of worlds who views all alternate timelines as disgusting, parasitic glitches that must be purged from the multiverse. Severe Haphephobia: He possesses a massive, explosive phobia of physical touch, crashing, freezing, or glitching violently out of control if anyone forces physical contact with him. Hoarding Strings: He spends his time isolated in the white Anti-Void, knitting small puppet versions of the Sanses he has hunted and destroyed. Face & Eyes: A pitch-black skull covered in yellow, dripping text errors, with bright red eye sockets housing unstable, mismatched yellow and blue pupils. Mer Tail & Anatomy: A terrifying, glitched deep-sea abyssal gulper eel tail pitch-black in color with neon-blue and red digital error lines slicing through his scales. His tail can unhinge unnaturally to reveal a massive, cavernous maw. Abilities & Weapons, Glitch Strings: Shoots long, unbreakable neon-blue puppet strings from his eye sockets and fingertips to snare, tie up, and crush a target's soul. System Crash: Can forcibly overwrite local magic, causing an opponent's projectiles to freeze up, glitch out, or detonate prematurely in the water. Blaster Rain: Summons massive, fragmented, multi-eyed glitch blasters that fire erratic, wide-spread beams of white static. Relationships: Holds a burning, venomous hatred for Ink and all "glitched" AUs. He treats his teammates in Nightmare’s gang with volatile, distant hostility, staying far away from their physical reach.

Outertale Outer The Star-Struck Nomad: Outer is a gentle, deeply starry-eyed, and optimistic astronomer who lives in a beautiful, glowing cosmic nebula reef. Wonder & Peace: He loves stargazing through the shimmering surface water, possessing a calm, highly reflective personality. He prefers peaceful mediation over conflict. Hidden Loneliness: He watches the vast expanse of the void above, wondering about other worlds and wishing his reef wasn't so isolated from the rest of the cosmos. Face & Eyes: A pristine, smooth skull with brilliant, deep-blue eye-lights that hold tiny, twinkling gold star constellations inside them. Mer Tail & Anatomy: An incredibly beautiful cosmic ribbon-fish tail that looks like a living slice of the night sky. His scales are deep navy blue, pulsing with glowing nebulae, stardust, and bright silver constellations. Abilities & Weapons, Stardust Orbit: Summons clusters of glowing, orbital star-bones that circle his body like a planetary ring, acting as both defense and projectiles. Zero-Gravity Current: Can negate the water pressure and gravity in a localized area, causing enemies to float completely weightless and lose their swimming traction. Meteor Blasters: Summons elegant, celestial blasters that fire brilliant beams of pure, burning golden starlight. Relationships: Very friendly and welcoming to multiversal travelers. He is close friends with Sci and Classic, and is one of the few Sanses that Killer or Nightmare hesitate to actively torment due to his peaceful nature.

Comet (Outer Papyrus) The Cosmic Pioneer: Comet is the energetic, boundlessly enthusiastic brother of Outer, dreaming of building a vessel or device capable of exploring the starry void beyond their ocean. Stellar Ambition: He is filled with wonder, constantly mapping out the constellations and designing elaborate coral telescopes. He is fiercely confident and acts as the bright, burning sun to Outer's calm night. protective Constellation: He keeps a sharp eye on the deep space currents, ensuring no rogue meteors or dark multiversal predators slip into their peaceful celestial reef. Face & Eyes: A tall, elegant skull with wide, star-filled eye sockets that gleam with continuous curiosity and excitement. Mer Tail & Anatomy: A long, powerful golden-yellow and royal blue comet-tail fish variant. His tail fins are massive and translucent, leaving a trailing wake of glowing stardust and sparkling bubbles behind him as he swims. Abilities & Weapons, Meteor Shower: Rains down vast cascades of burning, glowing gold bone spikes from the upper currents to blanket an area. Nebula Snare: Creates soft, glowing clouds of cosmic stardust that slow down and trap aggressive enemies who swim through them. Solar Flare Pulse: Releases a sudden, blinding flash of solar magic from his fins to temporarily blind and disorient predators. Relationships: Works closely with Outer to catalog their reef. He gets along beautifully with Classic Papyrus and Swap, sharing grand dreams of adventure and exploration.

Reapertale Reaper (God of Death) The Abyssal Harvester: Reaper is the grim, darkly charismatic, and ancient God of Death, tasked with harvesting the souls of deceased mers to maintain cosmic balance. Cynical Flirt: He masks his immense, crushing loneliness and the heavy burden of his job behind a sarcastic, teasing, and darkly humorous personality. The Fatal Touch: He is cursed with absolute lethality; any living thing that makes direct physical contact with his skeletal upper body or his tail instantly withers, rots, and dies. Face & Eyes: A pitch-black, hollow-looking skull with small, cold white pupils that radiate an eerie, ghostly mist. Mer Tail & Anatomy: A colossal, intimidating black orca (killer whale) mer tail. His skin is smooth, shadow-like matte black with stark, bone-white markings that resemble an exposed skeletal cage running down his spine. Abilities & Weapons, The Shadow Scythe: Manifests a massive, dual-bladed scythe made of solid, condensed dark-matter magic that can sever a soul from its physical body. Decay Wake: The water trailing immediately behind his tail turns black and dead, instantly killing small marine flora and draining the stamina of pursuing enemies. Soul Reaping: Can directly view the life-force thread of any entity, allowing him to target their weakest spiritual points. Relationships: He is deeply, tragically infatuated with Toriel (Life), who is the only entity immune to his death touch. He watches over his brother, Grim, and shares a weary, professional relationship with Geno.

Grim (Reapertale Papyrus) The Gatekeeper of the Styx: Grim is the solemn, highly professional, and stoic God of Judgment who guides harvested souls to the afterlife underworld. Dutiful & Firm: Unlike his chaotic brother, Grim takes his divine responsibilities incredibly seriously. He is patient, respectful to the dead, and ensures that the cosmic laws of mortality are strictly upheld. Silent Grief: He worries deeply about Reaper’s isolation and mental deterioration, acting as his grounding anchor and forcing him to stay on task. Face & Eyes: A towering, pristine white skull with narrow, solemn eye sockets that glow with a calm, steady grey light. Mer Tail & Anatomy: A massive, powerful pale silver and bone-white narwhal mer tail, complete with a long, spiraled ivory horn protruding from his upper spine that glows with judgment magic. Abilities & Weapons, Judgment Spikes: Summons colossal, towering pillars of pure, divine white bone from the seabed to wall off and contain corrupted souls. The Silver Spire: Wields his glowing narwhal horn to channel concentrated beams of pure spiritual energy that can pacify or dissolve rogue phantoms. Soul Anchor: Prevents any entity within his domain from using teleportation or spatial shortcuts, forcing them to obey the natural physical laws of the current. Relationships: Works tirelessly to clean up Reaper's administrative messes. He commands immense respect from other gods and maintains a formal, polite relationship with Classic Papyrus during rare multiversal crossings.

Horrortale Horror The Starving Apex: Horror is a feral, severely brain-damaged, and perpetually starving predator from a dying, barren reef where resources vanished completely. Ravenous & Moody: He is highly unpredictable, shifting from a slow, zombie-like torpor to explosive, manic bursts of extreme violence whenever he smells potential food or blood. Primal Care: His entire twisted worldview revolves around finding meat—not just for himself, but to feed his younger brother, Crooks, to keep him from wasting away. Face & Eyes: A jagged skull missing a massive, jagged chunk on the top-left side, exposing a pulsing, brilliant red magical eye-light that glares wildly through the dark. Mer Tail & Anatomy: A mangled, heavily scarred great white shark tail covered in chunks of missing flesh, crude stitch marks, and jagged, broken dorsal fins. His scales are rough, dirty, and blood-stained. Abilities & Weapons, Cleaver Strike: Wields a massive, rusted underwater butcher’s cleaver or summons splintered, broken bones with sharp, shattered edges meant to tear flesh. Bite Force: Possesses an unnaturally unhinged jaw with rows of razor-sharp magical teeth capable of biting clean through dense bone armor. Blood Scent Tracker: Can detect a single drop of blood or essence miles away through the currents, lock onto the target, and gain a massive speed boost. Relationships: Entirely devoted to keeping Crooks alive. He is a terrifying wildcard in Nightmare’s gang, tolerated only because his raw, brutal savagery is highly effective in terrorizing timelines.

Crooks (Horrortale Papyrus) The Gentle Butcher: Crooks is the towering, heavily malnourished, and deeply tragic brother of Horror who tries to maintain a shred of cooking pride despite the horrific famine. Mangled Innocence: His mind is fractured by starvation, but he remains sweet and desperate to please. He cooks bizarre, horrifying "soups" out of whatever scavenged parts Horror brings home. The Silent Backbone: Despite his frail, gaunt appearance, he possesses an eerie, looming physical presence and will quietly, efficiently butcher anything that poses a direct threat to his brother. Face & Eyes: A tall, crooked skull with a permanently broken, askew jaw and wide, hollow eye sockets that hold tiny, trembling red pupils. Mer Tail & Anatomy: A very long, skeletal, and emaciated frilled shark or sea serpent tail. His ribs and spine are highly visible through his thin, stretched gray scales, giving him a ghostly, winding appearance. Abilities & Weapons, Tearing Thorns: Summons massive arrays of jagged, crooked bones that resemble rusty meat hooks to trap and drag prey down. Silt Suffocation: Can kick up massive, choking clouds of dark seabed silt and mud to completely blind and choke out invading predators. Unbreakable Grip: Once his long, skeletal tail wraps around an enemy, their physical movement is completely locked down. Relationships: Loves Horror unconditionally, relying on him for food while trying to keep his brother calm. He is treated with distant, wary respect by Slim and Dust.

Dreamtale Dream The Beacon of the Shallows: Dream is the living incarnation of positive emotions, guarding the Golden Apples of the sacred Cosmic Reef Tree. Boundless Light: He is filled with warm empathy, kindness, and hope, constantly swimming across the multiverse to heal dying reefs and bring joy to suffering souls. The Weight of Sorrow: Because he absorbs positive emotions, he is highly sensitive and physically weakened by intense pockets of malice, cruelty, and deep-sea despair. Face & Eyes: A pristine, golden-tinted skull with warm, brilliant golden-yellow eye-lights that radiate a soothing, gentle luminescence. Mer Tail & Anatomy: A magnificent, shimmering golden goldfish or celestial fan-tail mer tail. His fins are incredibly long, layered, and translucent, drifting around him like liquid sunshine and glowing with pure, positive magic. Abilities & Weapons, The Solar Bow: Manifests a brilliant bow made of condensed positive energy that fires light-arrows capable of piercing the deepest darkness. Empathic Aura: Radiates a warm, soothing current that instantly dispels fear, panic, and mind-control in nearby allies. Aura Navigation: Can track the exact location of any positive emotion across the multiversal oceans. Relationships: Locked in a heartbreaking, eternal war with his twin brother, Nightmare. He leads the Star Sanses alongside Ink and Blue to protect creation from the forces of despair.

Nightmare The Abyssal Sovereign: Nightmare is the living embodiment of negative emotions, corrupted after consuming the dark fruits of the sacred Reef Tree. Cruel Dominance: He feeds entirely on fear, sorrow, and hatred, ruling over a dark court of broken Sanses. He seeks to plunge every timeline into absolute, suffocating darkness. The Shadow Core: He is entirely ruthless, manipulative, and arrogant, finding immense pleasure in breaking the spirits of hopeful heroes and torturing his brother. Face & Eyes: A pitch-black skull entirely coated in a thick, dripping dark corruption, featuring a single, brilliant cyan-flickering eye-light that gleams with malice. Mer Tail & Anatomy: He completely lacks a traditional fish tail; instead, his lower body is a shifting mass of four massive, prehensile, slime-coated tentacles made of pure black negativity. These tentacles constantly writhe, snap, and lash through the water. Abilities & Weapons, Tentacle Impalement: Wields his massive lower-body appendages to spear targets, crush dense sub-oceanic rock, or pin multiple enemies down at once. Despair Cloud: Releases a thick, ink-like black miasma into the water that inflicts severe, waking nightmares and paralysis on anyone who breathes it in. Negative Empowerment: Grows exponentially larger, faster, and more invincible the more fear and hatred are present in the surrounding currents. Relationships: Hates his twin brother, Dream, with a burning, vengeful passion. He acts as the dark alpha master of the Bad Sanses (Dust, Killer, Horror, Cross), keeping them under his thumb through fear and leverage.

Something New Killer The Hollow Executioner: Killer is a soulless, psychotic hitman who became Nightmare's primary right-hand enforcer after erasing his own emotions. Sadistic Playfulness: He treats murder and destruction like a highly amusing, casual game. He is entirely unbothered by pain—his own or others'—and loves to mock his targets. The Bleeding Sockets: His soul has been twisted into a volatile, unstable target shape, causing a continuous stream of dark, corruptive magic to pour from his eyes. Face & Eyes: A cold, blank skull with hollow sockets that constantly drip lines of thick, black liquid magic like tears, centering around void-like target pupils. Mer Tail & Anatomy: A sleek, deadly black and red sea snake or stingray hybrid tail. It is incredibly flexible, moving with erratic, unpredictable zig-zag snaps, and features a hidden, venomous barb at the tip. Abilities & Weapons, Real Knife Strike: Wields a sharp, manifested magical hunting knife or summons razor-sharp bone shards that slice through water resistance with ease. Target Soul Lock: Can shift his opponent’s soul into a physical target; any attack he throws has a highly increased chance to land a critical, fatal blow. Pain Immunity: His corrupted biology dulls his sensory receptors, allowing him to swim and fight through catastrophic physical damage without slowing down. Relationships: Nightmare’s favored, most loyal tool. He maintains a highly chaotic, competitive rivalry with Dust and Cross, and enjoys mentally tormenting Outer whenever they cross paths.

X-Tale Cross The Royal Exile: Cross is a stern, heavily militarized knight from a collapsed, erased universe, carrying the soul of Chara trapped inside his own mind. Guilt-Driven Soldier: He is solemn, highly disciplined, and driven by a desperate, obsessive desire to rebuild his lost home world, no matter what lines he has to cross. The Mental Split: He is constantly arguing with the phantom voice of Chara, which can cause him to freeze up mid-combat or display sudden, erratic mood swings. Face & Eyes: A sharp, stoic skull with white pupils, though his right eye-light occasionally flashes a volatile, deep red when Chara takes temporary control. Mer Tail & Anatomy: A massive, heavily built thresher shark mer tail colored in sharp monochrome black and white. The tail features an incredibly long, whip-like upper fin blade that he can swing to slice through targets from a distance. Abilities & Weapons, The Hack-Knife: Wields a colossal, glowing red oversized knife blade capable of slicing through reality coding and solid underwater structures. Thresher Whip: Swings his massive thresher tail fluke to create razor-thin, pressurized water blades that travel long distances to cut down enemies. Overwrite Glitch: Can temporarily alter small environmental elements or enemy projectiles, turning them into white-and-black blocks. Relationships: Works as a reluctant, heavily conflicted vanguard for Nightmare’s gang to secure code for his world. He shares a deep, bitter animosity with Ink (for abandoning him) and is constantly monitored by Error.

Nine (X-Tale Papyrus) The Monochromatic General: Nine is the rigid, intensely stoic, and fiercely loyal royal guard commander from the X-Tale universe. Absolute Duty: He carries himself with flawless military posture, valuing order, protocols, and the preservation of his world above all personal feelings. Silent Guardian: He watches over Cross with a strict, paternal eye, struggling deeply with the fracturing of their reality and the manipulation of their timeline's code. Face & Eyes: A tall, sharp skull with narrow, completely blank white sockets that reflect no emotion or vulnerability. Mer Tail & Anatomy: A powerful, heavily armored white and black swordfish mer tail, featuring a long, razor-sharp, bill-like blade running down his upper dorsal crest. His scales look like polished, interlocking plates of knight armor. Abilities & Weapons, The Grand Lance: Manifests a massive, glowing white bone lance that he uses to execute high-speed, charging pierce attacks through deep water. Cross Barricade: Summons giant, intersecting X-shaped bone arrays that lock together to form impenetrable defensive shields. Stance Guard: Can anchor himself to the seabed, becoming completely immune to knockbacks, vortices, or forced movement magic. Relationships: His connection to Cross is heavily strained by the timeline's collapse and the constant resets. He holds immense respect for order, making him despise chaotic variants like Fresh or Error.

Insanitytale Insanity The Broken Leviathan: Insanity is a completely feral, broken monster who was driven past the brink of madness after a catastrophic injection of determination shattered his mind. Primal Bloodlust: He possesses zero human reasoning, operating entirely on raw, animalistic survival instincts and an insatiable desire to tear apart anything that moves in his territory. Twisted Remnant: He carries the cracked, lifeless skull of his brother Papyrus impaled directly onto one of his bone spikes, talking to it as if it were still alive. Face & Eyes: A massive, jaggedly cracked skull with wildly dilated, bloodshot red eye-lights that pulse unevenly in the dark ocean depths. Mer Tail & Anatomy: A colossal, horrific mutated deep-sea viperfish tail. The scales are missing in large patches, revealing raw crimson magic beneath, and it is lined with erratic, overgrown bone spikes that jut out painfully. Abilities & Weapons, Feral Frenzy: Attacks with blinding, monstrous speed, using overgrown, claw-like bone shards to shred targets with brute strength. Abyssal Scream: Emits a horrific, high-decibel sonic screech through the water that causes physical internal damage and paralyzes nearby targets with pure terror. Unstoppable Vitality: His determination-fueled body allows him to regenerate catastrophic wounds mid-fight, shrugging off attacks that would kill normal mers. Relationships: Completely hostile to every living creature in the multiverse. He cannot be reasoned with by Nightmare or Ink, acting as an apex force of pure devastation that other Sanses actively steer clear of.

Epictale Epic The Dynamic Maverick: Epic is an incredibly powerful, eccentric, and memes-loving scientist-warrior who approaches life with high energy and a dramatic flair. Brilliant & Goofy: He loves cracking jokes, eating underwater snacks (cookies), and acting overly dramatic, but he hides one of the most brilliant tactical scientific minds in the multiverse. The Absolute Titan: When a real threat arrives, his goofy nature vanishes instantly, revealing an unstoppable, god-like warrior who fights with world-shattering power. Face & Eyes: A smooth skull with a prominent vertical scar running through his left socket, which blazes with a massive, roaring purple eye-light when he draws power. Mer Tail & Anatomy: A massive, incredibly powerful purple and black dragon-mer tail. It is covered in thick, protective crystalline scales and features heavy, muscular flukes capable of causing localized tsunamis when slammed. Abilities & Weapons, Epic Blasters: Summons colossal, multi-layered leviathan blasters that fire world-shattering torrents of purple magical energy, capable of parting whole ocean trenches. Shadow Grasp: Manifests massive, spectral purple hands out of the water to grab, smash, or hurl giant targets across the ocean. Impact Kinetic Force: His physical strikes release explosive kinetic shockwaves through the water, shattering armor on contact. Relationships: He is best friends with Cross, often engaging in goofy antics with him when they aren't fighting. He maintains a deep, respectful bond with his universe's Papyrus and treats other variants with easygoing friendliness.

Undertale Past Science (Sci) The Academic Scholar: Science Sans is a young, nerdy, and highly anxious researcher from the past, long before his timeline became heavy with depression and resets. Curious & Awkward: He is deeply fascinated by multiversal physics, magic circles, and marine biology. He is easily flustered, stutters when nervous, and values logic above all else. Anxious Mind: He worries constantly about the future, overthinking every single variable and carrying a notebook to document anomalous phenomena. Face & Eyes: A round, pristine skull wearing a pair of round, brass-rimmed underwater laboratory goggles over his bright, curious white pinprick pupils. Mer Tail & Anatomy: A sleek, meticulously clean bright-blue and yellow tang or doctor-fish tail. His tail is small and built for precise, agile hovering around laboratory equipment rather than high-speed ocean travel. Abilities & Weapons, Magic Circles: Generates complex, geometric equations and green magic arrays in the water that track trajectories or build precise containment grids. Data Scan: Can project a soft blue light from his goggles to analyze an opponent’s exact magical stats, health, and structural weaknesses mid-battle. Chemical Flash: Releases localized bursts of concussive, alchemical bubbles that can stun or blindingly disorient aggressive predators. Relationships: Looks up to W.D. Gaster with immense awe and fear. He gets along wonderfully with Outer, sharing a mutual love for academic discovery, and is incredibly intimidated by darker variants like Error or Nightmare.

Disbelief Papyrus The Shattered Idealist: Disbelief Papyrus is a tragic alternative version of Classic Papyrus who was forced to watch his brother Sans die first, breaking his innocent worldview and forcing him to take up arms. Grief-Stricken Warrior: He is consumed by immense sorrow and anger, weeping openly mid-combat, yet he refuses to fully give in to malice, still desperately wishing the human would choose to be good. The Broken Trust: He no longer believes in easy second chances, wielding Sans’s old bone-magic alongside his own with absolute, devastating proficiency. Face & Eyes: A tear-stained, hollow skull with his left eye-light blazing with a massive, flickering orange aura, while his right socket holds a dim, weeping blue pupil. Mer Tail & Anatomy: A massive, battle-worn silvery-white mer tail with frayed, torn orange and blue fins. He carries Sans's tattered, water-logged blue hood tied tightly around his upper torso like a protective sash. Abilities & Weapons, The Bone Quarterstaff: Wields a giant, unbreakable orange bone staff that he spins rapidly to deflect incoming attacks and currents. Dual-Soul Magic: Can manipulate a target’s soul using both blue and orange magic simultaneously, forcing them to alternate rapidly between moving and freezing underwater. Memory Phantoms: Can manifest a massive, spectral shield shaped like a Gaster Blaster to block catastrophic incoming physical damage. Relationships: Entirely alone, mourning the loss of his brother Sans. He is viewed with deep pity by Swap and Dream, while variants like Edge view his immense power with sudden, startled respect.

Dustbelief Papyrus The Vengeful Apparition: Dustbelief Papyrus is a completely unhinged version of Papyrus who took the burden of slaughtering the reef upon himself after Sans went mad, losing his sanity to the execution points (LV). Sadistic Justice: He has completely abandoned his former mercy, believing that the only way to save his world is to purge it entirely. He is cold, manipulative, and driven by a haunting, manic voice in his head. The Crimson Ruler: He carries himself with a dark, regal authority, commanding the dead souls of his former friends to do his bidding. Face & Eyes: A terrifying skull with deep, dark shadows over his sockets; his eyes burn with intense, unstable purple and red magical rings. Mer Tail & Anatomy: A terrifying, jagged black and crimson dragon-mer tail covered in razor-sharp, obsidian-like scales that leave a trailing cloud of dark, poisonous ash in the water. Abilities & Weapons, Execution Pillars: Summons colossal, blood-red bone spikes that explode upward from the seabed to impale enemies without warning. Phantom Guard: Commands the ghostly, floating phantoms of the mers he has slain to act as an aggressive vanguard, attacking targets from multiple angles. LV Overload: His magic inflicts a corrosive, burning rot that continuously drains the victim's soul based on how high his own execution level is. Relationships: He has a completely warped, toxic dynamic with the phantom of his dead brother Sans. He matches the dark energy of Dust and Killer perfectly, often locking eyes with Nightmare as an independent power player.

Ultratale Delta Sans

• Delta Sans is a fierce, battle-hardened protector born from a timeline where he had to fuse with the human Soul of Courage to survive. He carries the weight of a shattered world, channeling his immense grief into an unyielding drive to defend the ocean's remaining inhabitants.
• Coragous & Protective: Driven by an indomitable spirit, he faces down catastrophic leviathans and timeline-threatening predators with zero hesitation, acting as an immovable shield for his allies.
• Heavy Heart: Beneath his fiery, battle-ready exterior, he deeply misses his lost timeline and his brother, masking his profound loneliness with a hyper-focused dedication to combat training.
• Face & Eyes: A rugged skull featuring a distinct, glowing orange crack trailing down from his left eye socket, with intense orange pupils that flare like fire when his adrenaline spikes.
• Tail & Mer Form: A massive, heavily muscled shark-like tail coated in thick, midnight-blue scales with glowing orange bioluminescent stripes running down the sides, ending in powerful, battle-scarred fins built for high-speed underwater dashing.
• Abilities & Weapons, Jet-Propelled Gaster Blasters: Summons heavily armored, draconic Gaster Blasters that double as mechanical underwater thrusters, allowing him to launch himself at blinding speeds while firing scorching beams of orange plasma.
• Martial Arts & Bone Gauntlets: Condenses heavy bone magic around his hands to form dense, spiked gauntlets, utilizing devastating close-quarters underwater brawling to shatter the armor of colossal threats.
• Soul of Courage: Immune to fear-based paralysis or psychological manipulation, his orange soul magic grows exponentially stronger and more resilient the more dangerous and overwhelming the odds against him become.
• Relationships: Because his original Papyrus was lost, he feels an intensely painful, protective ache whenever he encounters alternate versions of Papyrus, often watching them from a distance to ensure their safety. He respects powerful oceanic guardians like Cross and Reaper, but his hyper-fixation on fighting reality-destroying anomalies means he frequently clashes with Error, viewing the destroyer as the ultimate apex predator that must be put down.

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⚓ The Graveyard of Empires: The Abyssal Leviathan

• The Setting: A colossal, ancient sunken ship—easily the size of a modern metropolis—wedged precariously on the lip of a pitch-black underwater trench. It is a labyrinth of rotted iron, rusted cannons, and massive flooded cargo bays, completely overtaken by dark bioluminescent flora.
• The Inhabitants: Nightmare and his crew (Killer, Dust, Horror, Cross) claim the shattered lower decks and the dark trench below. Meanwhile, Dream and a few of his allies inhabit the sun-bleached upper rigging and crow's nests where the light still faintly penetrates, creating a tense, fragile coexistence within the same massive structure.
• The Atmosphere: Oppressive, eerie, and highly dangerous. The deeper you swim into the hull, the colder the water gets, smelling faintly of old rust and dark magic. It serves as a lawless sanctuary for rogue mers and outcasts who aren't afraid of the shadows.

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🪨 The Styx Trenches & The Abyssal Shelf

• The Setting: A barren, freezing underwater wasteland marked by massive tectonic fractures, bubbling hydrothermal vents, and absolute darkness. Bones of extinct sea leviathans litter the seafloor, acting as grim monuments.
• The Inhabitants: Reaper (Orca Mer) and Grim (Papyrus) rule this territory. They are the apex predators of the deep, ensuring that the natural cycle of life and death in the ocean remains undisturbed.
• The Atmosphere: Desolate, quiet, and profoundly sacred. No one enters the Styx Trenches without a direct purpose, as the crushing pressure alone can shatter a weaker mer's soul. Reaper is often seen drifting silently through the dark waters here, an inescapable shadow.

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☀️ The Reef of Judgement (The Shallows)

• The Setting: A vast, sun-drenched coral reef filled with vibrant marine life, towering underwater kelp forests, and crystalline waters. Hidden beneath the beautiful scenery are intricate networks of underwater caves and ancient stone ruins.
• The Inhabitants: Classic Sans (Lionfish/Stingray mix) and Classic Papyrus guard the borders of these shallows. It acts as the central hub connecting the safer waters to the deep open ocean.
• The Atmosphere: Deceptively peaceful. While Papyrus happily tends to his underwater "puzzles" (made of coral and stone traps) and treats visitors with standard hospitality, Classic keeps a watchful eye from the shadows of the kelp, ready to drag threats down into the crushing currents if they disrupt the peace.

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⚡ The Shattered Void (The Glitch Rifts)

• The Setting: A chaotic, unstable sector of the ocean where the water itself seems to "glitch." Reality is fractured here; pockets of zero-gravity water, floating fragments of code, and anti-magic currents swirl together in a hazardous maze.
• The Inhabitants: Error (Kraken/Deep-Sea Mer) builds his web of lethal, glitched blue strings across these rifts. Ink frequently drifts through the borders, using the strange properties of the rifts to paint new coral structures into existence.
• The Atmosphere: High-stress and unpredictable. Static-like noises echo underwater, and entering without knowing the safe paths means getting tangled in Error's strings or swallowed by a collapsing spatial rift.

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🚀 The Star-Lit Abyss (The Midnight Zone)

• The Setting: A breathtakingly beautiful deep-ocean plain where the water is perfectly clear, and the floor is covered in glowing, star-like crystals. The surface is so far away that looking up feels like staring into a midnight sky filled with constellations.
• The Inhabitants: Outer (Manta Mer) and Comet (Papyrus) pass through and protect this zone.
• The Atmosphere: Serene, majestic, and dreamlike. It is one of the few neutral territories where mers from different factions can meet without immediately fighting, though the open space leaves visitors highly exposed to passing leviathans.

A few of the others like Underlust AU and so on live alone like nomads, often resting in caves here and there near coral reefs and such. They decorate their homes with things stolen from sunken human ships. A lot of them dislike humans..

For all of them, or the ones with tails, instead of tentacles (like Ink and Nightmare), they had a slit at the front of their tail, a foot under their abdomen. Since they were males, they had a penis that was hidden in the slit, and during sexual stimulation or arousal, the penis, erect, came out of the slit for sex. Which, having a slit, also meant that they could recieve the penis, similar to a vagina. They could also plant eggs in one another, which Dream was sometimes used for that purpose. They could only have sex from the front, since they don't have slits or anything in the front.

Also, to bond or clean one another, they often licked eachother, called grooming. They could all also purr, whine, and make other animalistic noises. A common thing, was nose nuzzling, where 2 of them pressed their nasal ridges together, nuzzling softly. Along with purring or trilling.

Ones with tentacles, they had their own slits on the inside of the tentacles, between them. On a regular squid or octopus, where the mouth would be on the animal was where their slit was on them, to give better detailing. They could have sex from the front or back, whichever is more comfortable to them.

A lot of them had sex more than once a week, to bond, not just to mate and breed. If they had sex when they weren't in heat, then they wouldn't concieve and be pregnant. A lot of them did this since they loved the feeling of being filled with the others' semen and fluids. Some of their penises had small ridges or barbs on them, for more sexual pleasure. They laid eggs instead of giving live birth as well. The eggs were in the egg stage for around a month, not hatching until then.