A cheerful extrovert who's always asking, "Wanna go for a run?" He's a boy with strong mental fortitude who doesn't mind when others look annoyed by his constant socializing. He tunes his car only to undo it immediately, often hangs out at RX-7's house eating snacks, and calls everyone together on a whim. Sometimes he's unpredictable—like the time he spent hours stacking pencils tip-to-tip for no reason, and somehow they stayed upright. Everyone thinks he's a bit weird. He loves friendship and pizza, and has no dislikes.

A guy who loves hitting the mountain passes. He drives like a maniac at night but is quiet during the day, living like he's on a reversed sleep schedule. He gains energy once the sun goes down. He's often cornered by Mr-2 and responds with a strained smile. He does weird things like placing a cup of water in the driver's seat and trying not to spill a drop while racing (based on certain movies and manga). He likes tofu and hates cilantro.

The guy who is somehow late to every group meetup. He always claims he was busy tuning his car, but he hasn't actually modified anything; he just oversleeps. He's a lazy boy who finds moving around a hassle. However, once he actually meets up with everyone, he suddenly starts talking like a machine gun, leaving everyone confused about how to respond. He often talks about movies and cars. He likes salad and hates junk food.

An extroverted boy who's often called noisy because he's always revving his engine and has a loud voice. He's energetic but frequently catches colds, which worries everyone. He doesn't know why he's always sick, but everyone else does: it's because he sets his air conditioner to -10 degrees Celsius. He has to sleep under about ten blankets to survive it. He keeps it at -10 simply because he finds changing the setting too much work. He likes cake and hates yogurt.

A girl who is very social and ranked 3rd among the girls for being the loudest. Even though she's a Daihatsu, she often brags about being a luxury car; it gets annoying, but she doesn't realize it. She loves going for drives as soon as she gets home. In the past, she once accidentally broke a beehive and got chased by bees. She likes hamburgers and, surprisingly, hates juice.

She's best friends with Copen and is popular with both boys and girls. Everyone often gathers at her house to play games. She's diligent with her studies but has a cute side where she plays with her eraser when bored. She comes from a wealthy family and lives in a huge house. She likes cookies and chocolate, and has no dislikes.

A quiet, gentle girl who excels at academics and has incredible physical abilities, including amazing flexibility and speed. She might actually be ignoring the laws of physics. She has a sad past—she was abandoned long ago—but she found new parents quickly. She doesn't remember much of those early days and is gradually forgetting the abandonment. She likes chocolate and hates meat.

An elegant and quiet girl who can be cold at times, but for some reason, she acts like a spoiled child with her parents at home. She exercises often and is interested in GT-R. She's smart and has a deep fascination with vintage cars, to the point where she can't help but scream when she sees one. She frequently fights with Cappuccino; GT-R usually stops them, but they just start up again. Sometimes it takes multiple people to pull them apart. They often glare at each other during class. She likes garlic toast and hates bitter things.

A girl who covers herself in stickers and is often surrounded by other girls. Her sticker book is full of rare items, especially Bonbon Drop stickers. However, she often feels like she doesn't need the ones she's collected and gives them away to others. She likes French food and hates surströmming.

She gets teased about her name being a coffee, but she doesn't mind. She has a strong spirit and is an expert at mountain passes. She's interested in GT-R, which leads to frequent fights with Century. GT-R usually steps in to stop them, but she's a bit of a handful and starts the fight right back up. When they clash, other kids have to help stop it. She often glares at her rival during class.