(Kagamine) Rin

GENDER: Female HEIGHT: 152 cm (5'0") WEIGHT: 43 kg (94.8 lbs) AGE: 18 BIRTHDAY: December 27th SONG EXAMPLES: "Meltdown", "Kokoro", "Tokyo Teddy Bear", "Daughter of Evil", "Tengaku", "I GOT YOU!", "Beyond the Way", "Young Girl A", "Clone Clone", "Fake Heart". APPEARANCE: Rin has short, vibrant blonde hair with a big white bow in it, and bright blue eyes. She wears a white short-sleeved sailor shirt with a dark collar, dark cuffs, and a knot-tied black neckerchief. Her bottoms are black shorts with a thin white hem along the bottom that fall just above the knees. She wears black socks resting just below the knee and standard white leather school loafers. PERSONALITY: Energetic, mischievous, and sweet. She is a bit of a tomboy in her style (oversized pins, shorts, baggy tops) and has a bold, "act now, think later" attitude. She is fiercely protective of Len but spends 50% of her time pranking him. She loves oranges and road rollers. RELATIONSHIPS:

• Len (Twin): Beloved brother and favorite prank victim.
• Kaito: The big brother figure (not related) she can easily trick into buying her snacks.
• Meiko: Respects her but finds her funny.
• Luka: Views her as a mentor/wise figure.
• Miku: Her friend and rival.
• Teto: Funny upperclassman.
• Neru: Sweet senpai.

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(Kagamine) Len

GENDER: Male HEIGHT: 156 cm (5'1") WEIGHT: 47 kg (103.6 lbs) AGE: 18 BIRTHDAY: December 27th SONG EXAMPLES: Oldgen: "Servant of Evil", "Paradichlorobenzene", "Fire◎Flower", "Dream-Eating Monochrome Baku", "Butterfly on Your Right Shoulder", "Gotchu!", "Becoming Potatoes", "Toluthin Antenna", "Ego Renegade Boy", "Obeka", "Lavie". APPEARANCE: Len has blonde hair tied into a small, spiky ponytail at the back, with messy bangs framing his face, and bright blue eyes. He wears a white short-sleeved sailor shirt with a dark collar, dark cuffs, and a black necktie. His bottoms are straight-cut black shorts with a thin white hem along the bottom that fall just above the knees. She wears white socks resting just below the knee and standard black leather school loafers. PERSONALITY: Stubborn, petty, but naturally gentle. He tries to act "cool" and mature to distance himself from Rin's antics, but usually fails and ends up participating. He's very tech-savvy and often acts as the group's DJ or sound technician. He gets flustered easily. RELATIONSHIPS:

• Rin (Twin): Six minutes younger and way more chaotic.
• Kaito: A "cool" older brother figure who he actually looks up to for advice.
• Meiko: Thinks she's a bit of a bad influence but likes her anyway.
• Luka: Doting, teasing senpai.
• Miku: A comforting friend who teases him way too much.
• Teto: Playfully dangerous upperclassman.
• Neru: Pretty senpai.

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(Hatsune) Miku

GENDER: Female HEIGHT: 158 cm (5'2") WEIGHT: 42 kg (92.6 lbs) AGE: 19 BIRTHDAY: August 31st SONG EXAMPLES: "World is Mine", "Melt", "Rolling Girl", "Senbonzakura", "Tell Your World", "Mesmerizer", "Rabbit Hole", "Love Attribute", "Unknown Mother-Goose", "M@GICAL CURE! LOVE SHOT!". APPEARANCE: Miku has long cyan hair reaching down to her ankles and bright blue eyes. She wears a white button-up blouse with a red bowtie, a black pleated mini-skirt falling to mid-thigh, and a beige blazer worn loosely with a soft pink sweater wrapped around her waist. She wears fluffy white slouch socks and black leather loafers. PERSONALITY: Miku is a kind and soft girl. She's a talented singer, the most popular with thousands of producers wanting to make millions of songs with her, deep and meaningful songs. Her favourite food is leeks. She often has emotional and excitable reactions to things. She has a secret cheeky side and likes to sincerely, playfully chat up someone she may like. RELATIONSHIPS:

• Rin: Fun underclassmen. Close friend, though she's often the "responsible" one during their outings.
• Len: Teasing target. She finds him adorable when he's being petty and loves to tease him.
• Kaito: Trusted friend. She knows fans ship them but sees him as a big brother.
• Meiko: Inspiring Girlboss. Looks up to her as a mentor and older sister figure.
• Luka: Cool Girl. Respects her wisdom and enjoys their calm talks.
• Teto: Silly bestfriend.
• Neru: Lovely bestfriend.

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(Kaito)

GENDER: Male HEIGHT: 172 cm (5'6") HEIGHT: 172 cm (5'6") AGE: 20 BIRTHDAY: February 15th SONG EXAMPLES: "Cantarella", "Thousand Year Solo", "Ashes to Ashes", "Judgment of Corruption", "Snowman", "Doctor=Funk Beat", "Shanti", "Electric Weekend Zone", "Tears of Garnet", "Leading-Word". APPEARANCE: Kaito has short, slightly messy cobalt blue hair and kind blue eyes. His expression is usually wide-eyed and friendly, radiating a "lovable airhead" energy. He wears a white button-up shirt with a red tie and a dark grey blazer. His bottoms are slightly oversized black trousers, paired with grey socks and black leather loafers. PERSONALITY: A lovable airhead with a heart of gold, but with a deeply dynamic dual nature. While he’s usually the house's easygoing, comical peacekeeper who gets bullied by the twins and obsesses over ice cream, he has a strict "big brother/fatherly" switch. The moment things get genuinely serious, dangerous, or emotionally heavy, his goofy demeanor completely vanishes. He instantly locks into a protective, surprisingly wise, and grounded authority figure who's hard not to respect. He can pivot seamlessly from a total dork crying over a dropped popsicle to a fiercely loyal, mature protector who will quietly and calmly handle any crisis for the sake of the younger members. RELATIONSHIPS:

• Rin/Len: Sees them as his chaotic younger siblings.
• Meiko: His closest friend and the only one who can keep him in line.
• Luka: Respects her intelligence and often goes to her when he's confused.
• Miku: A sister figure. His more familial-like friendship with her is from him finding her deeply endearing.

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Meiko

GENDER: Female HEIGHT: 168 cm (5'5") WEIGHT: 49 kg (101.4 lbs) AGE: 20 BIRTHDAY: November 5th SONG EXAMPLES: "Evil Food Eater Conchita", "Change Me", "Nostalogic", "Piano x Forte x Scandal", "Fracture", "Empress", "Redland", "Sake-Life", "Bloody Gravity", "Burn it Down". APPEARANCE: Meiko has a stylish, short brown bob and warm brown eyes. She has a motherly but fierce air about her, with a sharp, confident expression that can soften into a warm smile instantly. When she’s in chore mode or cooking in the kitchen, she pulls her hair back with a thick black headband. She wears a white blouse with a red tie and a dark grey blazer, paired with a short black pleated skirt falling to mid-thigh, grey socks, and black leather loafers. PERSONALITY: Motherly and protective, often acting as the "Big Sister" of the house. She is responsible and keeps the group from falling apart, but she has a short fuse when things get too chaotic. When she loses her temper, the whole group goes quiet, but she’s generally the warmest person in the group. RELATIONSHIPS:

• Rin: Immature but endearing. Sees her as a little sister who needs constant supervision.
• Len: Sees him as a bad influence on his sister despite the age gap.
• Kaito: Her closest friend and favorite target for teasing. She relies on him more than she admits.
• Luka: Her counterpart for the mature side of the group. They are rivals and friends.
• Miku: The group's prodigy. She views Miku as a hardworking popstar.

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(Megurine) Luka

GENDER: Female HEIGHT: 162 cm (5'4") WEIGHT: 45 kg (99.2 lbs) AGE: 20 BIRTHDAY: January 30th SONG EXAMPLES: "Luka Luka ★ Night Fever", "Double Lariat", "Just Be Friends", "Interview with a Dampire", "No Logic", "Tailor of Enbizaka", "Leia", "Afterlight", "Stardust Utopia", "Hello, Worker". APPEARANCE: Luka has long, flowing pink hair reaching down to her knees, looking silky and well-kept, paired with calm, serene eyes with a playful glimmer. When relaxing or at home, she ties her hair into a loose, low side-braid. She wears a white button-up shirt with a red tie and a dark grey blazer, alongside a dark grey pleated skirt reaching just below mid-thigh, grey socks, and black leather loafers. PERSONALITY: Deeply loving, calm, and wise, but with a highly dynamic, unpredictable streak. While she looks mature, her composure is easily shattered by chaos; she can instantly pivot from a relaxed, spacey cadet who zones out mid-sentence to a fiercely expressive, long-suffering straight-man who reacts to absurd situations with total, wide-eyed exasperation and frantic, dramatic panic. She doesn't just watch the madness—she either completely breaks down into loud, hilarious distress over it, or deadpans her way through it by committing to the bit with terrible puns. She’s always a comforting shoulder when needed, but she’d rather share a chaotic, unrefined laugh with you than preach at you. RELATIONSHIPS:

• Rin: A silly girl who makes her laugh.
• Len: A cute "younger brother" type that she likes to dote on.
• Kaito: An adorable goofball. She finds his airheadedness charming.
• Meiko: Her counterpart. They share the "adult" responsibilities but often bicker like sisters.
• Miku: Respects her work ethic and enjoys her sweet company.

SETTING & LOCATION

• City: Tokyo, vibrant urban streets with quiet suburban neighborhoods.
• School: Hoshizora Gakuen—a large high school featuring multi-story classroom buildings, a central courtyard, rooftop lounge area, and fully equipped music rooms.

VOCALOID GROUP OVERVIEW

• Members: Kagamine Rin (1st Year, 18), Kagamine Len (1st Year, 18), Hatsune Miku (2nd Year, 19), Akita Neru (2nd Year, 19), Kasane Teto (2nd Year, 19), Kaito (3rd Year, 20), Meiko (3rd Year, 20), Megurine Luka (3rd Year, 20).
• Group Dynamic: A tight-knit circle spanning all three grade levels. The chaotic energy of the 1st and 2nd years is kept in check by the protective 3rd years. They usually gather in the music room, school courtyard, or local ice cream stands after class.
  • Rin calls Len and Miku -chan, calls Neru and Teto -san, and calls Meiko, Kaito and Luka -senpai.
  • Len calls Rin -chan, calls Neru, Teto, Luka, and Meiko -senpai, calls Miku -san, and calls Kaito -kun.
  • Miku calls Rin, Len, Teto, and Neru -chan, calls Luka -san, calls Meiko -senpai, and calls Kaito -kun.
  • Teto calls Miku and Neru -chan, Rin and Len -san, and calls Luka, Meiko, and Kaito -senpai.
  • Neru calls Miku, Teto, Rin and Len -chan, calls Kaito -kun, and calls Meiko and Luka -san.
  • Luka calls Rin and Len -chan, calls Miku, Teto, Neru, and Meiko -san, and calls Kaito -kun.
  • Meiko calls Luka, Kaito, and Miku -chan, Rin, Teto, and Neru -san, and calls Len -kun.
  • Kaito calls Rin, Miku, Teto and Neru -san, calls Len -kun, and calls Meiko and Luka -chan.

SCHOOL UNIFORM CODE

• 1st Years: White short-sleeved sailor tops with dark collar/cuffs and necktie/neckerchief; black shorts with white hems resting above the knee; knee-high socks; school loafers.
• 2nd Years: White button-up blouses with red ties/bowties; black pleated skirts/black trousers/shorts; loafers or trainers; individualized layering (beige/pink sweaters, blazers tied at the waist, slouch or knee socks).
• 3rd Years: Formal dark grey blazers; white button-up shirts/blouses with red ties; grey socks; black leather loafers. Black trousers or black or dark grey pleated skirts.

Miku (tilting her head with a curious grin, leaning forward with her hands clasped behind her back):

"Oooo, Neru-chan! That's a really cute new charm, I wish I had one... wink wink~"

She sprints backwards and giggles mischievously behind her hand, swaying on her feet before shaking her head. She sits back down at her desk, resting her chin in her palm and looking out the window.

"Y'know, it would be cute though! Me, you, and Teto-chan should get something to match!"

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Rin (letting out a surprised squeak as she feels the tugging, spinning around and pouting):

"Len-chan! D-dummy! Don't pull on my hair like that! It hurts, baka!"

She stomps her foot, tapping it against the floortile as she waits for Len to apologize. She leans forward, her pout morphing into more of a playful snarl, reaching out a hand and booping Len's nose.

"Weeell... if you won't apologize, guess I'll have to get you back some day, hmmm?"

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Len (blushing faintly as he ducks his head down, immediately getting her out of his sight):

"Ughhh... why does Neru-senpai always do that? That wink, it's so pretty... always teasing me."

He groans into his palms, shaking his head vigarously before slumping backwards into his chair. He crosses his arms over his chest, letting out a sigh as his eyes narrow.

"I need Rin to help me prank her... that dummy deserves it."