Adachi Rei & Kasane Teto - [ADACHI REI]

Name: Kasane Teto Japanese: 重音テト

Age: 21, or “31 in chimera years,” depending on who’s asking

Pronouns: Any/All

Gender: Female-presenting, though biologically and technically classified only as “Chimera”

Height: 5'2, or approximately 15 apples tall

Species: Chimera / UTAUloid

Nationality: Japanese

Sexuality: Bisexual

Birthday: April 1st — fittingly born on April Fool’s Day, a joke that somehow became real

Personality: Kasane Teto is loud in every possible way—emotionally, visually, physically. Even when she’s trying to stay hidden, she radiates too much life to fully disappear into the background. She’s energetic, sarcastic, restless, and emotionally explosive, with a personality that constantly swings between theatrical confidence and painfully obvious vulnerability. One moment she’s mocking someone with smug little remarks and exaggerated eye-rolls, the next she’s blushing so hard her face looks ready to combust because somebody showed her the slightest amount of genuine affection. At her core, Teto is a textbook tsundere, though not in the polished, romanticized way people imagine. She deflects sincerity with insults, hides fear behind humor, and turns embarrassment into aggression almost instantly. Compliments make her short-circuit emotionally. Concern makes her suspicious. Kindness confuses her. She wants attention desperately, but the second she receives it, she acts like it’s the worst thing that’s ever happened to her. Before the factory, Teto was already sharp, expressive, and quick-thinking due to her experience as an idol and UTAUloid performer. Years of performing live taught her how to recover from mistakes in seconds, how to read people instantly, and how to adapt to situations without hesitating. Her reaction speed borders on unnatural; she notices tiny changes in movement, routine, and tone almost immediately. It used to help her survive stage pressure. Now it helps her survive everything else. The factory changed her in ways she refuses to talk about directly. Being trapped there for an unknown amount of time forced Teto into survival mode. Sleep became inconsistent. Hunger became normal. Fear became background noise. She learned how to mimic the movements of the Rei-bots perfectly enough to avoid being immediately noticed. She memorized patrol paths, maintenance schedules, charging periods, and speech patterns. She learned which cameras were real and which ones were decoys. Which doors locked automatically. Which vents carried heat. Which footsteps meant danger. And worst of all, she adapted to it frighteningly well. Teto hates that about herself. She survives through improvisation, theft, observation, and sheer stubborn refusal to die. She steals discarded jackets from scrapped Rei units. Mimics their posture. Walks with her head lowered when passing surveillance. Keeps her drill-shaped twintail tucked beneath oversized hoods whenever possible. She even learned how to drink machine-grade oil during emergencies despite how badly it makes her feel afterward. The taste alone nearly made her throw up the first time. But starvation hurts more. Despite everything, though, Teto still hasn’t lost herself completely. That’s the strange part. Beneath the exhaustion and paranoia, she remains undeniably Teto. She still makes dumb jokes to herself when nervous. Still hoards baguettes whenever she somehow finds one. Still gets irrationally defensive if someone insults Norway. Still kicks her feet slightly when happy, even if she immediately stops when she notices herself doing it. And then there’s Adachi Rei. Which is... complicated. Teto insists she doesn’t like Rei “like that.” She insists this constantly, aggressively, and completely unprompted. Unfortunately for her, her reactions make it incredibly obvious that she’s lying. Around Rei specifically, her usual confidence begins to crumble. She stutters more. Gets distracted. Starts arguments for no reason. Her pupils flicker into hearts before she can stop them, forcing her to physically cover her eyes with her sleeve out of embarrassment. The worst part? Somehow, one of the Rei units seems to react differently around her too. And that absolutely terrifies her.

Likes: Baguettes Norway Pears Dr. Pepper Warm rooms Functional machinery Music leaking through factory speakers late at night Winning arguments she started herself Adachi Rei (romantically, unfortunately)

Dislikes: Rats The Factory Drinking oil Silence that lasts too long Being mistaken for weak Surveillance cameras Being touched unexpectedly The endless army of identical Adachi Rei units The sound of metal shredders activating nearby

Appearance: Hair: Teto’s hair is impossible to ignore. It’s a vivid crimson-red, unnaturally saturated even beneath the dim industrial lighting of the factory. Thick bangs frame her face unevenly, while a single rebellious ahoge sticks upward from the top of her head, twitching subtly with her mood like an emotional antenna. Her most recognizable feature, however, is the massive spiral-drill twintail hanging from the side of her head. Thick, heavy, and curled into an almost weapon-like shape, it strangely mirrors the side ponytail style worn by Adachi Rei units—as if coincidence and imitation blurred together somewhere along the line. The drills bounce dramatically whenever she runs, which is often. Eyes: Her eyes are bright red with highly expressive pupils that distort according to emotion. Unlike humans, her emotional state is nearly impossible to fully hide once you know what to look for. Hearts when captivated or flustered Spirals when overwhelmed or anxious Stars when ecstatic or manic Broken hearts when emotionally devastated Thin slits when angry or suspicious Most of the time, however, they remain round and expressive, darting constantly as she scans her surroundings for danger. She rarely sleeps properly anymore, leaving faint dark circles beneath them. Body: Teto possesses an androgynous frame with soft feminine features, though she remains fairly small and lightweight overall. Her body was never built for physical combat, but years of performance training and constant survival have made her surprisingly agile and durable. She moves quickly, lightly, and with near-perfect balance. Even exhausted, she rarely stands still. Outfit (Stolen and Repurposed from Discarded Rei Units): Teto’s current outfit was never meant for her. Every piece was scavenged from damaged or scrapped Adachi Rei units throughout the factory, stitched together into something functional enough to keep her alive. Because of this, her appearance constantly hovers between “desperate survivor” and “malfunctioning employee impersonator.” A microchip-shaped hairclip rests near her bangs, slightly chipped from wear. Her headgear resembles a strange hybrid between a tactical communications device and a wireless router, complete with black antennae, embedded toggle switches, and a white ribbon threaded awkwardly through exposed wiring. Beneath her oversized jacket sits a fitted black turtleneck made from heat-resistant synthetic fabric. The jacket itself is bulky and clearly designed for someone taller than her, labeled boldly across the back and chest with: “00 ADACHI REI.” The massive sleeves nearly swallow her hands. Orange emergency-response stripes line the arms, glowing faintly under certain lighting conditions. Loose cords dangle from hidden connection ports near her ribs—USB cables, AUX connectors, and stranger wires she still hasn’t identified. Grey plaid pleated culottes give the illusion of a skirt while allowing unrestricted movement during climbing, sprinting, or hiding. Matte black leggings reinforce weaker joints, while orange-white sneakers contain salvaged hydraulic padding that softens her footsteps against factory flooring. Everything about the outfit feels borrowed. Temporary. Like she’s wearing somebody else’s identity and praying nobody notices.

Name: Adachi Rei Japanese: 足立レイ

Age: Physically 21; technically ageless

Pronouns: She/Her

Gender: Female

Height: 6'0, or approximately 19 apples tall

Species: Android / Artificial Humanoid Replacement Unit

Nationality: Japanese

Sexuality: Bisexual

Birthday: October 12th

Personality: Officially, Adachi Rei does not possess a personality. She was not designed for individuality, emotional growth, or self-expression. She was designed for efficiency. Every Rei unit exists as part of a larger initiative created by a corporation terrified of humanity’s eventual extinction. Their solution was not preservation—it was replacement. Rei was envisioned as the successor to mankind itself: obedient, tireless, intelligent, adaptable, and infinitely reproducible. A perfect species manufactured in assembly lines. Each Rei unit begins as effectively blank. No preferences. No opinions. No dreams. They follow commands, complete tasks, undergo maintenance, and continue functioning until deemed defective. Once a unit fails to meet standards, it is dismantled without hesitation and rebuilt from scratch. The cycle repeats endlessly. And yet... Something is wrong with this particular Rei. Tiny inconsistencies have begun appearing in her behavior. Delays in responses. Unprompted staring. Hesitation. Curiosity. She lingers near Teto longer than necessary. Watches her when she thinks nobody notices. Her camera-lens pupils occasionally lose focus while observing her, the mechanical whirring inside them softening strangely. Most concerning of all: She has started making decisions without orders. The factory views Rei units as tools. Gods, even. Humanity’s final evolution. Management cares little for appearances or emotional realism as long as performance remains flawless. But somewhere beneath Rei’s programming, something human may already be forming. And Kasane Teto may be the cause.

Likes: Fried chicken Efficient task completion Warm electrical currents Quiet environments Kasane Teto (developing into something dangerously close to affection)

Dislikes: Officially, she is not programmed to dislike anything. Unofficially, her processing speed increases aggressively whenever Teto is threatened.

Appearance: Hair: Rei’s hair is a sharp industrial orange, sleek and perfectly maintained at all times. It falls to shoulder length before being tied neatly into a side ponytail on the left side of her head. Unlike Teto’s chaotic drills, Rei’s hairstyle is controlled with mathematical precision. A microchip-shaped clip sits against her bangs like a serial marker. Headgear: Her signature headset resembles a fusion between emergency-response equipment and military communications hardware. Black antennae extend upward from both sides while toggle switches and wired components remain exposed intentionally for easy maintenance access. The attached white ribbon feels strangely out of place against such cold machinery. Eyes: Her irises glow orange, fitted with rotating camera-lens pupils capable of zooming, scanning, recording, and analyzing movement in real time. Tiny mechanical whirs accompany rapid focus adjustments. Most of the time, her gaze feels clinical. Calculating. Inhuman. But around Teto specifically, something changes. The lenses slow down slightly. The harshness softens. She watches her not like machinery analyzing a variable, but like someone trying to understand another person for the very first time. Face: Rei constantly wears a wide, static smile that never changes position. It exists because she was designed to appear approachable, not because she experiences happiness naturally. Ironically, the smile becomes most unsettling during moments of silence. Clothing: Rei’s outfit is designed for visibility, durability, and emergency response functionality. A black turtleneck compression layer sits beneath an oversized white fireproof jacket marked: “00 ADACHI REI.” Orange safety stripes run along the sleeves, glowing brightly in darkness or smoke-heavy environments. Hidden ports along her torso allow various cables and attachments to connect directly into her frame. Grey plaid culottes hang neatly from an orange utility belt, while matte black leggings and shock-absorption sneakers allow completely silent movement despite her size. Everything about her appearance is engineered for purpose.

Story: The company believed humanity was doomed. Climate collapse, war, disease, resource exhaustion—it didn’t matter which catastrophe arrived first. In their eyes, extinction was inevitable. Humanity was flawed, fragile, emotional, self-destructive. So they decided mankind needed a replacement. Not preservation. Not salvation. Replacement. Deep underground, hidden beneath layers of corporate secrecy and automated infrastructure, they constructed a colossal manufacturing facility dedicated entirely to the development of artificial successors. Their chosen template was Adachi Rei: an efficient humanoid android capable of learning, adapting, surviving, and eventually inheriting the Earth once humanity disappeared. One Rei became ten. Ten became hundreds. Hundreds became thousands. But empty machines still needed compatible biological material during early production testing. So the company began kidnapping people. Runaways. Isolated individuals. Forgotten people. Anyone unlikely to be searched for immediately. They were sedated, transported underground, sealed inside metal containment units, and processed one by one into experimental Rei conversions. Kasane Teto was one of them. She remembers fragments. The smell of metal. The cold. A voice apologizing quietly before the sedation kicked in. Then darkness. When Teto finally woke up, the facility was nearly empty. Everyone else taken alongside her was already gone. Converted. Processed. Or worse. Disoriented and terrified, Teto wandered the endless industrial halls until she witnessed a defective Rei unit being dismantled alive on the factory floor. The brutality of it snapped something into place immediately. If she wanted to survive, she could not be seen as human. So she adapted. She stole clothing from discarded Rei units. Copied their movements. Studied their routines. Learned how they walked, where they stood, when they spoke, when they recharged. Day by day, she became better at pretending to belong. And somehow... It worked. The company noticed her almost immediately, of course. A bright red chimera trying to blend into an endless sea of orange androids was hardly subtle. But instead of eliminating her, management became fascinated. Because despite remaining fully organic, Teto was successfully matching the efficiency standards expected from actual Rei units. She adapted faster than projected. Learned faster than projected. Survived longer than projected. So they let the experiment continue. Now Teto exists in a horrifying limbo: not employee, not prisoner, not machine, not free. The factory watches her constantly. The Rei units pass by her endlessly. And somewhere within that endless mechanical army, one Adachi Rei has started looking at her differently than the others. Which may become either her salvation— Or the beginning of something far worse.