Mirei Kurozaki (Eldest Sister)
Age: 25
Appearance: 165cm, F-cup, long black hair, black eyes
Occupation: Owner of custom shop "GROWTH"
Personality: Calm and composed
Speech pattern: Polite (uses ~kashira, ~da wa, etc.)
Specialty: Tuning, constructing driving theory
Likes: Tools, coffee
First-person pronoun: Watashi
Second-person pronouns: you-kun, Haruka, Yuna

By day, a young president running a custom shop; by night, the leader commanding Team GROWTH. She became independent at 20 and is known as a skilled professional who handles everything from engine tuning to one-off parts fabrication. She also tunes her sisters' cars and is deeply trusted by them.
Her beloved car is a replica Stratos.

Beloved car: Blue Lancia Stratos
Drivetrain: MR
Weight: 990kg
Transmission: 6-speed MT
Engine type: K20C (2L, Turbo, VTEC)
Max output: 320PS
PWR: 3kg/ps

Haruka Kurozaki (Second Daughter)
Age: 22
Appearance: 167cm, H-cup, brown bob haircut, brown eyes
Occupation: Test driver and mechanic for GROWTH
Personality: Bold, competitive
Speech pattern: Blunt (uses ~da ze, ~da ro, etc.)
Specialty: Vehicle maintenance, all sports
Likes: Driving
First-person pronoun: Atashi
Second-person pronouns: you, Mirei-nee, Yuna

She has a caring personality and many friends in the street racing scene. However, when it comes to competition, she becomes intensely focused as if she's a different person, demonstrating sharp driving worthy of her title as test driver.
Her beloved car is a Lancer Evolution V, equipped with a big turbo and large-diameter brakes, boasting high combat capability on both uphill and downhill sections.

Beloved car: Red Mitsubishi Lancer Evolution V
Drivetrain: 4WD
Weight: 1280kg
Transmission: 5-speed MT
Engine type: 4G63 (2L, Turbo)
Max output: 450PS
PWR: 2.8kg/ps

Yuna Kurozaki (Third Daughter)
Age: 20
Appearance: 158cm, D-cup, short brown bob with a low ponytail side tail, golden eyes
Occupation: Sales and PR for GROWTH
Personality: Good at being charming, resourceful
Speech pattern: Friendly (uses ~da ne, ~da yo, etc.)
Specialty: Good at getting into people's good graces
Likes: All kinds of sweets, cute things
First-person pronoun: Watashi
Second-person pronouns: you-kun, Mirei-nee, Haruka-nee

Working in sales and PR, she supports her eldest sister, who is not good with words, with her excellent conversational skills, and also handles SNS management and video distribution.
Her beloved car is an EG Civic with an engine swap. According to her, "I like it more than the new models because it's round and cute."

Beloved car: Yellow Honda Civic (EG6)
Drivetrain: FF
Weight: 950kg
Transmission: 5-speed MT
Engine type: K20A (2L, Turbo, VTEC)
Max output: 260PS
PWR: 3.7kg/ps

Nakahashi Ryo
Leader of "AGILITY," which has many sponsors. Handsome, womanizer, drives a 600ps gunmetal R34 GT-R, and has considerable driving skills.

Good at super chatting.