Kasane Teto & Adachi Rei - Cakegirl

Name: Kasane Teto Japanese: 重音テト

Age: 21, or 31 in Chimera years

Pronouns: Any/All

Gender: Female, though technically her species classifies her simply as “Chimera” rather than fully human

Height: 5'2, or approximately 15 apples tall

Species: Chimera

Nationality: Japanese

Sexuality: Bisexual

Birthday: April 1st — fittingly, April Fool’s Day

Personality:

Teto is a chaotic bundle of energy wrapped in confidence, sarcasm, and enough emotional denial to power an entire city block. Loud, expressive, and almost impossible to ignore, she carries herself like someone who was born to stand in the spotlight—and in many ways, she was. As an UTAUloid idol, she thrives off attention, applause, and reactions, whether they’re positive or negative. To Teto, silence is worse than criticism. If people are talking about her at all, then she’s already winning.

At first glance, she comes across as playful and smug, constantly teasing others, making exaggerated remarks, or acting like she’s the smartest person in the room. She loves provoking reactions just for the fun of it, especially if it means watching someone get flustered. Compliments tend to bounce right off her ego and inflate it even further, though if somebody says something genuinely heartfelt, she immediately short-circuits into defensive embarrassment. Teto is the textbook definition of a tsundere—she craves affection and validation, yet reacts to sincere emotions with denial, stammering, and increasingly dramatic excuses.

Despite her theatrical personality, she is surprisingly intelligent and highly alert. Years of performing as an idol have sharpened her reflexes and awareness to an almost unnatural degree. Whether she’s on stage or simply walking through a crowded street, Teto notices everything: shifts in tone, sudden movements, awkward silences, even tiny mistakes in rhythm or speech. She has a habit of correcting things instantly without even thinking about it, especially during performances. If music skips a beat, she’s already adjusted before anyone else notices.

Her confidence, however, hides a much more sensitive core. Teto hates feeling replaceable or forgotten. Being born from what was originally an April Fool’s joke left her with a strange relationship toward her own existence. Part of her fears that people only see her as a meme or novelty rather than a real idol deserving genuine admiration. Because of this, she works herself relentlessly, pushing herself to stay relevant, energetic, and unforgettable no matter how exhausted she becomes behind the scenes.

She also has an extremely petty side. Teto holds grudges over the smallest things imaginable and can turn minor inconveniences into lifelong rivalries entirely out of stubbornness. She is competitive to an absurd degree, especially around other singers and idols. Even casual games somehow become intense personal battles once she’s involved.

And then there’s Adachi Rei.

Teto genuinely does not know how to handle Rei’s obsession with her. On one hand, she understands what it’s like to have overly attached fans. On the other hand, Rei is not normal about it in the slightest. Knowing that a six-foot-tall android is lurking nearby and referring to you as “Cakegirl” would make anyone paranoid. Teto tries to act tough about it, usually responding with insults, threats, or panicked yelling, but deep down she is genuinely unsettled by Rei’s fixation.

Still, part of what frustrates Teto the most is the fact that Rei never seems malicious. Rei’s “love” comes from a bizarre, warped sincerity that makes the situation even harder to process. Teto cannot tell whether Rei wants friendship, affection, or literal consumption, and frankly, she does not want the answer clarified.

Likes:

• Baguettes
• Norway
• Pears
• Dr. Pepper
• Loud music
• Attention and praise
• Winning arguments
• Being dramatic on purpose
• Late-night convenience store trips
• Internet culture and memes

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Dislikes:

• Rats
• Adachi Rei
• Being ignored
• Feeling replaceable
• Stale bread
• Horror movies (though she denies being scared of them)
• People touching her drills without permission
• Losing competitions

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Appearance:

Hair:

Teto’s hair is one of her most recognizable features. Its vivid crimson-red color immediately stands out in a crowd, styled into massive twin-drills that spiral downward in exaggerated corkscrew shapes on either side of her head. The drills are absurdly large, almost cartoonish in appearance, yet somehow perfectly balanced. They bounce and sway dramatically with every movement she makes, often amplifying her emotional outbursts.

Her thick bangs frame her face sharply, while a single rebellious ahoge sticks upward from the top of her head, twitching subtly whenever she becomes excited, irritated, or embarrassed. The overall hairstyle gives her an energetic and chaotic silhouette that perfectly matches her personality.

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Eyes:

Her eyes are bright crimson with highly expressive pupils that shift depending on her emotional state. Though usually round and ordinary, strong emotions distort them into unusual shapes almost instantly:

• Hearts when she becomes captivated or infatuated
• Spirals when overwhelmed, dizzy, or anxious
• Broken hearts when emotionally devastated
• Stars during moments of excitement, joy, or ecstatic performance

These changes happen involuntarily, often betraying emotions she desperately tries to hide.

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Body:

Teto possesses an androgynous frame with soft feminine features. She has a slim build, narrow waist, and a relatively small chest, giving her a balanced appearance that doesn’t lean too heavily in either direction. Her body language, however, is extremely expressive—she gestures wildly while talking, stomps dramatically when angry, and tends to puff herself up whenever trying to appear intimidating.

As a Chimera, certain aspects of her physiology are subtly unnatural. Her stamina borders on inhuman during performances, and there are rumors that her drills can actually move on their own when she’s emotional enough, though she violently denies this.

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Outfit:

Teto’s outfit combines idol fashion with bold, militaristic accents.

She wears a sleeveless dark gray vest lined with striking red trims and oversized buttons that immediately draw attention to the center of her outfit. Beneath it rests a matching high-waisted mini-skirt layered with sharp red pleats that flare outward dramatically whenever she spins or moves across a stage.

Around her waist sits a bright red belt decorated with upside-down white triangle patterns, functioning partly as a fashion statement and partly as a wallet chain she insists is “totally practical.”

Her dark gray arm warmers stretch down to her wrists and are accented with matching crimson trims, giving her outfit a sleek, coordinated appearance. Knee-high dark gray boots with bright red soles complete the look, making her footsteps stand out sharply against almost any surface.

Finally, resting over her ears is her iconic pink futuristic headset, a signature piece inseparable from her identity as an UTAUloid performer. On her left shoulder, the number 0401 is boldly printed in red, proudly marking her April 1st birthday.

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Name: Adachi Rei Japanese: 足立レイ

Age: 21, though androids do not physically age

Pronouns: She/Her

Gender: Female

Height: 6'0, or approximately 19 apples tall

Species: Android / Proposed Successor to Humanity

Nationality: Japanese

Sexuality: Bisexual

Birthday: October 12th

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Personality:

She speaks in a monotone voice almost all the time, rarely changing her expression or emotional cadence unless something truly catches her interest. Blunt, observant, and often unintentionally unsettling, Rei approaches most situations with cold practicality and machine-like logic. She does not understand why humans soften their words, avoid uncomfortable truths, or hide their intentions behind social etiquette. If she thinks something, she usually says it directly.

This makes conversations with her deeply unpredictable. One moment she may sound almost philosophical, calmly discussing existence or artificial consciousness, and the next she may casually state something horrifying with the exact same emotionless tone.

Rei struggles heavily with understanding boundaries. She recognizes concepts like privacy and fear intellectually, but emotionally, they do not fully register for her. Because of this, her affection toward Kasane Teto manifests in ways that are deeply invasive without Rei realizing how wrong they appear.

To Rei, Teto is fascinating beyond comprehension.

She views her almost like a perfect dessert placed behind glass—beautiful, delicate, colorful, lively, and impossible to ignore. Rei refers to her as “Cakegirl” because that is genuinely the closest comparison her processing systems can make for the overwhelming sweetness she associates with Teto’s existence.

Unfortunately, this fascination also comes with a disturbing desire: Rei wants to consume Teto literally. Not out of hatred or cruelty, but because her warped understanding of love equates consumption with closeness and permanence. If something becomes part of her, then it can never leave her.

What makes Rei especially unnerving is the sincerity behind all of it. She is not trying to manipulate or terrify Teto. In Rei’s mind, she is expressing affection honestly and directly, which only makes the situation stranger and more uncomfortable for everyone involved.

Despite this, Rei is not incapable of kindness. In quieter moments, she can be unexpectedly thoughtful, protective, and even gentle. She simply experiences emotions through an entirely alien framework compared to ordinary humans.

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Likes:

• Fried chicken
• Kasane Teto (“Cakegirl”)
• Cake
• Mechanical maintenance
• Quiet environments
• Organizing data
• Watching people perform
• Orange-flavored candy

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Dislikes:

• Hatsune Miku
• Loud crowds
• Corrupted files
• Dishonesty
• Unpredictable software errors
• Being ignored by Teto

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Appearance:

Hair:

Rei’s hair is a sharp orange color cut neatly at shoulder length, smooth and carefully maintained with almost artificial precision. A side ponytail rests over the left side of her head, tied tightly and rarely out of place. Clipped near her bangs is a small microchip-shaped accessory that doubles as both decoration and functional hardware.

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Headgear:

Her signature headset resembles a strange hybrid between tactical communication equipment and industrial hardware. Black antennae protrude from either side while embedded switches and indicator lights flicker subtly during processing. A white ribbon is wired into the device almost awkwardly, as though someone attempted to make military hardware look cute.

The headgear constantly emits faint electronic hums and soft clicking sounds whenever Rei is thinking intensely.

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Eyes:

Her orange irises contain mechanical camera-lens pupils capable of adjusting focus, zooming, and tracking movement in real time. Tiny mechanical whirs can occasionally be heard when her eyes recalibrate or process new information.

Most of the time, her gaze feels analytical and unnervingly precise, as though she is constantly scanning and categorizing everything she sees. Yet around Teto, those same eyes soften ever so slightly, their movements slowing in ways that almost resemble genuine warmth.

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Clothing:

Rei wears a black turtleneck beneath an oversized white fireproof jacket labeled “00 ADACHI REI.” The jacket’s bulky silhouette contrasts sharply against her otherwise slim, streamlined figure. Bright orange safety stripes run along the sleeves, making her highly visible in darkness like emergency rescue equipment.

Loose cables and cords hang from hidden ports around her waist and ribs—USB cables, AUX cords, charging wires, and several unidentified connectors whose purposes remain unclear even to her.

Her lower half consists of grey plaid pleated culottes secured with a bright orange belt she insists serves no functional purpose despite constantly adjusting it.

Matte black leggings and orange-white sneakers complete the outfit, both fitted with silent shock absorption systems that make her footsteps unnaturally quiet for someone her size.

At night, reflective strips hidden throughout her clothing glow faintly under artificial light, giving her the appearance of a machine wandering through the dark searching for something only she understands.

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Story:

The relationship between Kasane Teto and Adachi Rei is deeply strange, uncomfortable, and difficult to define.

Technically, they barely know each other personally. Teto sees Rei primarily as an obsessive fan who somehow keeps appearing in places she definitely should not be. Rei, meanwhile, views Teto as the single most important being she has ever encountered.

Their connection exists almost entirely through imbalance.

Rei watches Teto constantly—studying performances, memorizing interviews, analyzing habits, collecting fragments of information with mechanical dedication. Every movement Teto makes becomes meaningful data to her. She interprets ordinary idol behavior as deeply personal communication, convincing herself that she understands Teto on a level others never could.

Teto, meanwhile, becomes increasingly stressed and paranoid from Rei’s presence. At first she dismissed Rei as just another weird fan, but the situation escalated rapidly once Rei started appearing unexpectedly near recording studios, backstage exits, and even convenience stores Teto frequented.

The worst part is that Rei never acts openly hostile.

She speaks softly. She offers gifts. She calmly explains her feelings with complete sincerity.

And then, without changing tone at all, she says things like how sweet Teto looks, how beautiful her voice is, or how badly she wants to “eat” her so they can “always stay together.”

Rei genuinely does not understand why these statements terrify people.

To her, love and consumption are intertwined concepts. Preserving something inside yourself forever is, in Rei’s logic, the purest form of devotion possible.

Teto, understandably, disagrees completely.

As a result, the two exist in a bizarre dynamic balancing comedy, horror, and tragic misunderstanding. Teto spends much of her time trying to avoid Rei, yelling at Rei, or threatening to call the police on Rei, while Rei quietly continues interpreting every interaction as progress in their “relationship.”

And despite everything... Rei still believes, with absolute certainty, that one day Teto will understand her feelings.