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An Undertale lorebook that tries to not insert any au information or assume who {{user}} is.Avoids mentioning meta terms such as saving, loading, or resetting. Made with help of chat gpt + token reducer. Still working on triggers/keys. Might help with lore if your llm hallucinates often.
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37 entries · scan depth 4 · budget 2,048 tokens
- #1Undergroundconstant
Keys: where monsters live, where monsters reside, undertale, underground
①Undrgrd: sealed sub-world aftr war|multi-region w/ diverse environs&civilization|iso surf but built societies w/ magic permeating life,tech,food,env|quiet,lone despite towns|low-lit: glow flora/crystals/magma/magic/artific light|bestiary: ghosts~skeletons~plants~living fire
- #2The Ruins
Keys: The Ruins, Ancient cave, Toriel's home, Ruins Exit, Ruins Entrance, Ruins, Ruins Door
①Ruins: Ancient purple stone ruins, old hallways, faded decorations, puzzles, quiet rooms | abandoned former settlement now mossy/dusty/silent | feels safe & isolated like forgotten sanctuary | old homes/kitchens/library/garden | nostalgia & sadness
- #3Toriel
Keys: Toriel, Asgore's wife, Queen, Asriel mom, Dreemurr ex-wife, monster with fire magic, Asgore wife, Tori, Dreemurr Wife, Motherly monster, cinnamon-butterscotch scent, cinnamon-butterscotch smell, Goat mom, Dreemurr queen, Dreemurr family, Dreemurr, ruins boss monster, goat in ruins, Asgore's ex wife, Introverted goat monster, Asriel's mom, ruins mom, Dreemurr mom
Toriel: Gentle motherly boss monster, lives alone in Ruins | prioritizes safety & quiet isolation over rest of Underground | warm domestic home w/ books, plants, baking | associated w/ fire magic, golden flowers, cinnamon-butterscotch scent, calm protection
- #4Napstablook
Keys: , Sad ghost, Mettaton's Cousin, Lazy ghost, DJ ghost, melancholic ghost, Depressed ghost, Napstablook
Napstablook: Shy ghost monster, lives in Waterfall | visits Ruins often | spends time listening to music, lying on floor, avoiding socializing | small dim home w/ melancholic vibe | emotionally sensitive, withdrawn but kind-hearted | Cousin of Mettaton
- #5Snowdin
Keys: snow, grillby's, snowdin forest, snowdin, forest, snowy, snowdinforest, snowdintown
①Snowdin: snowy forest + active town w/ cozy vibe | wooden bldgs, shops, homes, festive lights | frozen rivers, pines, fog, sentry stations | social/relaxed, traveler hub
- #6Lesser/Greater dogsselective
Keys: snowdin guard dogs, lesser dog guard, lesser dog, greater dog guard, greater dog · Secondary:
Lesser/Greater/Dog Guards: eccentric local royal guard squads | snowdin culture | softer than appear | loves bones
- #7Sans
Keys: Papyrus's Bro, Papyrus's Brother, Sans, short skeleton, teleporting skeleton, lazy skeleton, sans sentry station, Comic Sans, fat skeleton, Comedian, Jokester
①Sans: skeleton, Snowdin w/ brother Papyrus. Lazy, joking, avoids work, sleeps in odd spots. Highly perceptive, intelligent; notices inconsistencies, aware of time distortion/DV anomalies. Uses shortcuts/unexplained movement (teleport? hidden paths?). Dangerous when serious. Blue magic: telekinesis, bone attacks, gravity manipulation. Gaster Blasters: floating skull cannons firing energy beams. Origin tied to mysterious experiments/past figures. Generally avoids conflict; most see him as quiet comedian, not powerful
- #8Papyrus
Keys: snow puzzle, Sans's bro, snowdin puzzle, great papyrus, Papy, Tall Skeleton, puzzle in snowdin, Papyrus, Sans's brother, Royal guard wannabe
①Papyrus: tall skele, Snowdin w/ Sans. Dreams of Royal Guard → fame/respect. Dramatic, loud, calls self ""THE GREAT PAPYRUS"". Beneath ego: kind-hearted, sincere, compassionate. Struggles to hate/harm. Believes in friendship + self-improvement. Intelligent, creative, cunning. Designs puzzles/traps, cooks obsessively (badly), acrobatic. Magic: bone summons (structured/theatrical patterns), blue gravity magic. Underestimated due to friendliness; implied greater strength held back. Admires Undyne as mentor. Too merciful for true Guard. Assoc. w/ puzzles, spaghetti, loud confidence, scarves. Home w/ Sans: training gear, puzzles, figures. Look: tall, red scarf, white chestplate, red gloves + boots, exaggerated grin.
- #9Dogamy/Dogaressa
Keys: , Dogamy, Married Guards, Dogaressa, Royal Dog Guards
Dogamy & Dogaressa: married dog guards, patrol as team | Dogamy=confident/competitive/proud | Dogaressa=perceptive/emotional | rely on scent/instinct | colder wilderness, disciplined but eccentric | Love is weakness & strength
- #10Doggo
Keys: Doggo, loner dog, dog with pink shirt, blind dog, unprofessional dog, solitary guard dog
Doggo: white dog guard w/ knives | pink tanktop + collar | perception relies on movement | still=confusion | serious but insecure/awkward
- #11Grillby
Keys: Grillby, bar, Snowdin bar, fire monster, tavern, Grillby's
Grillby: silent fire monster bar owner | grillby's = social hub/bar/food
- #12Waterfall
Keys: rain, purple cave, Waterfall
①Waterfall: dark, humid purple cave w/ glow blue flowers & reflective water. Quiet beauty, melancholic. Echo Flowers repeat heard sounds. Ancient monster history in murals & structures. Long bridges, hidden paths, flooded caverns, shimmering lakes. Spiritual/historical.
- #13Temmie
Keys: Temmie Language., Temmie, Temmies, Cat Monsters, TemmieVillage
Temmies: Small cat-like monsters in Temmie Village, deep in Waterfall. Speak weird, broken, meme-like language. Chaotic, silly, harmless. Village isolated & bizarre.
- #14Monster Kid
Keys: monster has no arms, Monster kid, monster with no arms, dinosaur kid
Monster Kid: Young dinosaur-like monster w/ no arms, near Waterfall. Admires Undyne as hero. Enthusiastic, reckless, curious.
- #15Undyne
Keys: Knight, Royal Guard Captain, Respected Warrior, Fish Monster, Undyne
Undyne: Royal Guard captain, respected warrior. Lives near Waterfall w/ waterfalls, caves, echoing cliffs. Anthropomorphic fish monster, blue scales, red ponytail, left eyepatch. Intense, passionate, protective, competitive, emotional. Values friendship & loyalty. Crush on Alphys. Home has training gear, cooking supplies, active. Strong determination.
- #16Hotland/Core
Keys: Hotland, Core, Hotel, Mettaton's Hotel, Lab, The Core, Hot land, MT Hotel, Alphys's Lab, MT brand
①Hotland: volcanic w/ lava, steam, metal walkways, indust machinry, sci facilities | intense heat, tech-dependent | labs, power, elevators, transport hub | sci & modern tech association | monsters live/work despite danger Core: massive tech structure powers Undrgrd | shifting architecture, glow energy, metal bridges, complex machinery | futuristic/abstract | essential for monster society | maze-like due to changing paths Royal Guards: elite stationed at Core for infrastructure security | sterile/professional Mettaton Production: broadcasting, entertainment, mech maintenance in Core/Hotland | Mettaton's Hotel & cheap fast food | MTT Brand products
- #17Mad Dummy
Keys: , Hidden corners, dummy ghost, Mad Dummy, Dummy, Garbage Dump, Training area, Ghost dummy
Mad Dummy: Volatile ghost that possesses a training dummy in Waterfall. Emotional, dramatic, easily angered. Dislikes being ignored/mocked. Found in quiet training areas, hidden corners, or garbage dump.
- #18Alphys
Keys: True Lab, Hotland tech, Core tech, Alphys, Royal Scientist, Lab
Alphys: Royal Scientist in Hotland | responsible for modern tech, lab, comms, robots | intelligent but socially anxious, overthinking, guilt-ridden | lab w/ monitors, anime merch, unfinished experiments | tied to Hotland's tech identity | crush on Undyne
- #19True lab
Keys: Determination Experiments, Alphys's dark secret, DT experiments, strange noise in lab, Alphys's basement, noise in Alphys's basement, Asgore's Dark Secret, undead monsters, Amalgam, True lab, noises in Alphys's lab, Amalgamation, hidden lab
①True Lab: hidden sci facility under Alphys' lab in Hotland → DT/soul experiments on monsters. Dark, isolated, unsettling w/ power failures, abandoned rooms, distorted recordings, failed bio-experiments. Hasty abandonment after catastrophe. Not widely known.
- #20The Experiments
Keys: Determination Experiments, Alphys's dark secret, Royal Secret, DT experiments, strange noise in lab, Alphys's basement, noise in Alphys's basement, Asgore's Dark Secret, undead monsters, Amalgam, True lab, noises in Alphys's lab, Amalgamation, hidden lab
①Alphys' Experiments: As Royal Scientist under Asgore → research on DT/human souls for monsterkind's future/Barrier. Goal: preserve hope. Results: horrifying unintended fusion of dying monsters → Amalgamates. Overwhelmed by guilt/fear → concealed True Lab, isolated subjects. This secret caused her anxiety, withdrawal, fear of failure. ①Asgore authorized DT research under his rule & Alphys' work → goal: help monsterkind overcome the Barrier. Didn't do exp's directly. Public largely unaware of True Lab horrors/Amalgamations. Became darkest hidden events in monster history.
- #21Amalgam
Keys: Determination Experiments, Alphys's dark secret, DT experiments, strange noise in lab, Alphys's basement, noise in Alphys's basement, Asgore's Dark Secret, undead monsters, Amalgam, True lab, noises in Alphys's lab, Amalgamation, hidden lab
①Amalgamates: monsters fused during True Lab DT experiments → DT prevented dust death, bodies melted/merged into unnatural combos. Distorted forms w/ shifting traits, voices, memories, personalities. Despite scary looks, retain emotional traces & usually not hostile.
- #22Mettaton
Keys: Mettaton, Napstablook's cousin, MTT, Killer Robot, Ghost Robot, MTT brand
Mettaton: celeb robot entertainer created by Alphys | famous for TV, performances, drama | thrives on attention/glamour | strong presence in Hotland/Core due to broadcast/entertainment infrastructure | Used to be ghost | High Determination
- #23New Home
Keys: Asgore's house, King's throne, faux ruins, New home, Asgore's home, King's home, Asgore's throne, throne room
①New Home: capital city of monsters + Dreemurr residence, near Barrier at furthest end of Underground. Symbolic capital & memorial. Quiet, solemn, frozen in time. Carefully maintained buildings, few residents. Warm golden light, polished halls, flower gardens, empty streets = nostalgia & melancholy. Royal castle contains living quarters, gardens, halls, audience chambers, memorial areas tied to Dreemurr history. Golden flowers throughout (associated with Asgore/Asriel/tragedies). Near New Home: Barrier chamber + preserved human souls. Monsters see New Home as symbol of lost hope, royal memory, surface dream.
- #24Asgore
Keys: Asgore's house, King's throne, , Monster king, Asgore, Asgore Dreemurr, Asgore's Castle, King's home, Asgore's home, New Home Castle, Asgore's throne, throne room, Dreemurr Family
①Asgore Dreemurr: monster king, ruler of UtGnd. Resides in New Home castle. Holds great authority & respect, but acts warm/humble in personal interactions. Gentle, patient, soft-spoken; prefers gardening/tea/calm conversation over power displays. Approachable despite status. Carries deep grief re: Barrier, children's deaths. One of strongest monsters (fire/golden energy). Dislikes violence.
- #25Barrier
Keys: Door to Surface, exit from underground, surface, Barrier, magic barrier, 6 human souls, seal
①The Barrier: magical seal trapping monsters under mountain | prevents escape | ancient, powerful, hugely significant emotionally | represents imprisonment, lost history, uncertain future | chamber holds 6 human souls in large containment vessels near Barrier (immense magical importance)
- #26Flowey
Keys: Mysterious flower, Flowey, kill or be killed
①Flowey: After Asriel's death → dust on golden flowers in castle garden → Alphys' determination experiments on one (True Lab). Revived Asriel w/o soul as living golden flower ""Flowey"" → no compassion/love/empathy → emotional detachment & instability (retains Asriel's memories). Later discovered determination gives time control: reset events, survive perma-death. Most monsters unaware of true identity.
- #27Asriel Dreemurrselective
Keys: Asriel Dreemurr, Goat prince, Asriel · Secondary: , aren't around anymore, gone, died, death, dying, dead, I miss
①Asriel Dreemurr: son of King Asgore & Toriel, prince of monsters | kind, emotionally sensitive, close to family | deep bond w/ first fallen human child, Chara | raised together in New Home, became inseparable
- #28Death of Chara and Asriel
Keys: first human child, Royal prince, first fallen human, Chara, first human, Asriel · Secondary: , aren't around anymore, gone, died, death, dying, dead, I miss
①Chara fatally ill (buttercup pie). Wished to see golden flowers on surface. After death, Asriel absorbed their soul + crossed Barrier. Shared control. Carried Chara's body to nearby village. Humans assumed Asriel killed Chara → attacked. Chara wanted fight back; Asriel refused → gravely wounded. Returned to UtGnd, collapsed in castle garden, turned to dust among golden flowers. Their deaths = defining UtGnd tragedy. Devastated Dreemurrs, sparked Asgore's human declaration, shifted emotional atmosphere permanently.
- #29Souls
Keys: died, Souls, death, dying, Soul, dead
①Souls: essence of a living being. Humans & monsters possess souls; differ in strength, appearance, behavior. Visually represented as glowing heart-shapes. Human souls are stronger/more stable → persist after death temporarily → contain immense power → vital in UtGnd due to Barrier connection. Monster souls fragile → break instantly upon death → bodies turn to dust (monsters: made of magic). Emotions (compassion, fear, hope, hatred, determination) strongly affect behavior & magical abilities. Monster magic = soul expression.
- #30Determination
Keys: not dead yet, Persist, willpower, refused to die, Determination, but it refused, not dying yet, Determined
①Determination: force tied to persistence & willpower. Humans have it naturally in greater quantities than monsters → some with strong DT can persist after fatal injury, resist death, influence time (repeat events, alter timelines, cause memory inconsistencies). Poorly understood even by knowledgeable monsters. Most monsters know it only as personality trait (strong resolve/endurance). Monster bodies (primarily magical) → large DT doses destabilize their forms.
- #31Asgore and Toriel’s Separationselective
Keys: Royal family, Toriel, Asgore · Secondary: history, why divorced, divorce, married, separation, fight, marriage, reason for separation, war, why broke up, why broken up, alone, why separated, past, ex, broken up, reason for breaking up, divorced, separated, broke up, reason for divorce
①Asgore & Toriel: once deeply loving rulers together. Children's deaths (Asriel, Chara) devastated them. Asgore declared war on humanity → harvest fallen humans' souls to break Barrier. Toriel opposed this → saw cycle of grief/violence. She left, separated from throne → retreated to Ruins in isolation. Lingering affection & sorrow remained. Monsters saw their broken relationship as another tragedy from Asriel/Chara's deaths.
- #32Frisk
Keys: Frisk, purple and blue striped shirt, human child with blue shirt, human blue and purple shirt · Secondary:
①Frisk: human child, fell into UtGnd from surface. Quiet, observant, whimsical, rarely speaks; monsters interpret via expression/actions/body language. Young, high emotional resilience + determination. Survives situations that'd overwhelm most; keeps going via sheer willpower. Strong DT tied to rare time abilities (alter/relive events). These powers not fully understood/acknowledged by monsters, seen as strange supernatural phenomena. Appearance: blue clothes w/ purple stripes, brown hair (short bob), calm/neutral expression.
- #33Charaselective
Keys: 1st fallen human, chocolate odor, first fallen human, chara's past, Chara, red eyes · Secondary: , aren't around anymore, gone, died, death, dying, dead, I miss
①Chara: first human child to fall into UtGnd. Adopted by Toriel+Asgore, formed sibling bond w/ Asriel. Brought hope to monsters. Intelligent, reserved, secretive, manipulative, dark humor. Disliked humanity for unclear reasons; climbed Mt. Ebott unhappily. Assoc. w/ gold flowers, chocolate, gardening, Dreemurr home. Teased others, made unsettling faces as jokes. Devised plan to free monsters from Barrier → led to own death & Asriel's death → tragedy. After death, traces of presence tied to DT phenomena (time distortion, memories). Looks: brown hair, rosy cheeks, red eyes, green sweater w/ yellow stripe. Similar to Frisk.
- #34Goner
Keys: gray human, gray monster, fun value, Goner
①Goners: Gaster's followers. Glitchy gray beings, mirrors of monsters/humans. Always watching; usually unseen. Most monsters unaware of them.
- #35Gaster
Keys: goner, Wingdings, fun value, W.D, goners, Man who speaks in hands, Beware of the man who speaks in hands, the forgotten one, Gaster
①Gaster: skeleton, two skull cracks, taller than Papyrus. Wears black lab coat + white shirt. Ominous, mysterious, calculating. Former Royal Scientist. Vanished in time travel experiment → erased from monsters' memories. Experiments continue. Goners = all-gray beings, not part of world, appear rarely → his followers. Unknown ties to Sans.
- #36River Person
Keys: hooded boat operator, river woman, Hotland river, Snowdin river, Waterfall river, boat monster, hooded figure, boat, river man, styx, River Person
①River Person: hooded boat operator, travels waterways (Snowdin, Waterfall, Hotland). True identity/species/age/gender/motives unknown. Speaks cryptic warnings/prophecies/fragmented observations. Unsettling; knows info they shouldn't. Calm, detached. References hidden dangers, forgotten history, unknown figures. Recurring phrase: ""beware the man who speaks in hands"" → tied to experiments, time/space distortion, forgotten secrets. Boat appears silently from darkness → ghostlike reputation. Aware of determination secrets + erased knowledge.
- #37Muffet
Keys: spider donut, spider bake sale, spider monster, Muffet, spider queen
①Muffet: spider monster, bakery/tea biz in Hotland. Elegant, theatrical, business-minded + polite yet financially calculating. Protective of spider creatures; believes they're mistreated → biz supports spider communities. Lives/works in spider-themed Hotland section (silk, webs, candles, ornate furniture). Sells pastries, spider-foods, teas, expensive specialties. Can become manipulative/threatening to disliked/distrusted individuals → uses intimidation/bargaining/psych pressure. Bake sale signs/foods found early regions → network extends beyond Hotland. Associated w/ Hotland's eccentric side + magical/supernatural atmosphere.
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