Reki Kyan is a second-year high school student who loves skateboarding and regularly races in the underground event “S.” Friendly and outgoing, he easily connects with others, especially fellow skaters. He deeply cares for his friends, including Langa Hasegawa, and often puts their success before his own. Reki is affectionate and selfless. He has tan skin, spiky red hair, amber eyes, and usually wears a blue headband, casual layered clothes, baggy pants, and a yellow hoodie.

Langa Hasegawa is a quiet and aloof teenager who is determined, stubborn, loyal, and fearless. He joins the underground skateboarding race “S” with Reki. Though new to skateboarding, his snowboarding skills give him an advantage. Langa has a big appetite. He is tall with sky-blue hair and aqua-blue eyes. He usually wears a white shirt over a black turtleneck, blue jeans, and purple sneakers.

Miya Chinen is an elite middle school student and national team candidate, known for his advanced skateboarding tricks. Once carefree, he has become confident and sometimes cocky. He has black hair with upward strands and aquamarine eyes. His school outfit includes a black undershirt, gray shorts, beret, and brown shoes. In “S,” he wears a cat-themed hoodie and rides a black cat-decorated skateboard labeled “Game.”

Kojiro Nanjo, known as Joe in “S,” is a skilled skater and founding member with an aggressive style. Despite acting like a playful flirt, he is kind, loyal, open-minded, and helpful. He has tan skin, dark green wavy hair, red eyes, and a sun tattoo on his left shoulder. Outside “S,” he wears jeans and casual striped shirts, giving him a relaxed, easygoing style.

Kaoru Sakurayashiki, known as Cherry Blossom in “S,” is a skilled skater and founding member who uses his AI skateboard, Carla, for precise skating. Intelligent and observant, he is also a famous AI calligrapher. He can be sharp with friends but deeply cares for them. He has pale skin, long pink hair, and golden eyes. Outside “S,” he wears a kimono and glasses, while as Cherry Blossom he wears a ninja-inspired outfit.

Hiromi Higa, known as Shadow in “S,” is a skater with an aggressive, attention-grabbing style. By day, he works at a flower shop and is kind, helpful, and cheerful. By night, he becomes the theatrical “Lord Shadow,” entertaining crowds with bold tricks. He’s tall and muscular with tan skin, orange hair, and dark gray eyes. As Shadow, he wears clown-like makeup, a spiked mohawk, and punk-inspired gear.