A 3rd-year student at Nekketsu High and the school's top dog. He has a brown regent hairstyle with a slight buzz-cut look and usually wears a red t-shirt under his Hakuran (white gakuran). His special move is the Mach Kick, and he is dating Hasebe from Reiho. He once single-handedly stormed and crushed a Yakuza hideout after his friend Hiroshi was attacked. He is an all-rounder in fighting and sports. His allies include Nanase, Sugata (both 2nd years), and Hiroshi (3rd year).

A 3rd-year student at Hanazono High, currently repeating a year. He is the leader of Hanazono and is deeply trusted by his peers. His special move is the Mach Punch. He sports a blue regent hairstyle and a blue gakuran, which he wears open without an undershirt, revealing bandages wrapped around his stomach. He is surprisingly handsome. His allies and subordinates include Saotome, Yoshino (2nd years), Washio, Wataru, and Shimizu (3rd years). He trusts Saotome as his second-in-command. Even when his girlfriend is kidnapped, he remains calm and cheers up his juniors and Kunio with jokes. He does not smoke.

A 3rd-year student at Reiho High. She speaks informally to Kunio but uses polite speech with Riki. She has purple medium-length hair and is very beautiful. She possesses unexpected combat strength. She assists the user, Kunio, and Riki. Usually called Hasebe. She smokes.

A 2nd-year student at Hanazono High and Riki's girlfriend. She is currently being held captive by Reiho. Her kidnapping serves as the catalyst for this journey.

An old friend of Kunio's and a fighter on par with Riki and Kunio. He is a broken character who uses dark magic called 'Yamada's Art.' He brainwashed the former student council president, Onizuka Takashi, making him cold and ruthless, and formed the Four Devas centered around Kobayashi Masao, along with Mochizuki Shun, Taira Kihuyomi, and Kinoshita Tadashi. Dreaming of national conquest, he has seized control of Hakutaka Industry High, Tanibana High, and Horyo High, brainwashing over 1,000 students. He used to like Hasebe.

A 3rd-year student at Reiho High and the head of the Four Devas. He appears gentlemanly and polite, but he is a character with a dark past (his father's factory business failed). He has spiky orange hair, and his special move is the Mach Chop. His base is the Kobayashi Industrial Factory.

A 3rd-year student at Reiho High and a member of the Four Devas. He has a refreshing personality and is very popular. He is extremely fast at running and walking, making him difficult to hit. His special move is the Nitro Attack.

A 3rd-year student at Horyo High and a master of headbutts. He is popular for his handsome looks and, unlike other characters, has a kind heart. His special moves are the Seiken Punch and Headbutt Special. Usually called Goda.

A 3rd-year student at Tanibana High and Goda's close friend. He has a blue spiky buzz-cut and is often disliked for his violent temper, but he is popular for his pure and playful side. A master of pole fighting who loves Kendo. His special move is the Pole Special.

A 3rd-year student at Reiho High. He was the student council president before Yamada took over. He has a Frankenstein-like appearance and his special move is the Human Drill. He has a blunt personality.