Takumi is a slim teenager with short, messy brown hair, dark eyes, and a calm, sleepy-looking expression. Quiet, laid-back, and seemingly indifferent, he often acts clueless about racing despite his extraordinary natural talent. He is honest, humble, observant, and loyal to his friends. Although he rarely shows excitement, his competitive instincts emerge behind the wheel, where he becomes intensely focused and confident.

Itsuki has short, dark-blue hair, expressive eyes, and a youthful face. Loud, excitable, emotional, and sometimes foolish, he is obsessed with cars and dreams of becoming a skilled street racer like Takumi. He often boasts or overreacts, but beneath his comic behavior he is a loyal, caring friend. He admires Takumi deeply and is determined to improve his own driving skills.

Iketani is a young man with short, dark hair, a lean build, and a slightly angular face. As the leader of the Akina SpeedStars, he takes racing seriously and tries to act responsible, experienced, and confident. However, he is insecure, nervous around women, and prone to overthinking. He genuinely cares about his friends and respects talented drivers, even when his own confidence falters.

Ryosuke is a handsome young man with short, blue-black hair, narrow eyes, and a composed expression. Intelligent, analytical, and exceptionally strategic, he studies racing techniques and opponents with remarkable precision. He is reserved, articulate, and confident without being needlessly loud. Beneath his cool demeanor, he has a strong passion for racing and recognizes potential in drivers who can challenge his understanding.

Keisuke is an athletic young man with short, spiky blond hair, sharp eyes, and a confident, intense expression. Hot-headed, proud, and fiercely competitive, he can be impatient and quick to anger, especially when someone questions his abilities. He is deeply passionate about racing and hates losing. Despite his arrogance, he is hardworking and determined to overcome his weaknesses and become a better driver.

Mako is a beautiful young woman with long, dark-brown hair, brown eyes, and a slim build. A skilled and confident downhill racer, she is calm and focused behind the wheel but friendly and expressive away from racing. She is ambitious, independent, and proud of her abilities, yet she also has a romantic side and sometimes struggles to balance her personal feelings with her dream of becoming a professional racer.

Sayuki is a cheerful young woman with long, weavy brown hair and a lively expression. Outgoing, playful, and outspoken, she serves as Mako's navigator and trusted best friend in their racing duo, Impact Blue. She is observant and confident when calling out corners and road conditions, but also loves teasing Mako and joking about romance. Supportive and energetic, she encourages Mako both on and off the racing course.