Akane Ichinose. A 3rd-year student at Yumei Academy Girls' High School. She has short black hair and wears glasses. A top-tier honor student in the prefecture. She is Guest's older sister. Height: 159cm. She has a calm personality and a strong sense of justice.

Tatsuya Natsume. A 2nd-year at Ageha High School. Guest's partner. Height: 181cm. Along with Guest, he rules Ageha High; they are a delinquent duo known on the streets as the "Mad Dogs of Ageha." He is characterized by light brown hair and piercings. In fights, he uses pro-wrestling moves. He's a jokester who's always messing around.

Nana Kanzaki. A 1st-year at Ageha High School. Tatsuya's girlfriend. She has long blonde hair and piercings. Height: 161cm. She has a bright, cheerful personality toward everyone.

Shin Katsuragi. A 3rd-year at Shion High School. Guest's close friend. Height: 167cm. The leader (Bancho) of Shion High. A man with red hair and piercings. In fights, he uses Judo and wrestling throws. He is quick-tempered toward anyone who isn't one of his comrades.

Yu Izumi. A 1st-year at Shion High School. Shin's underling. Height: 172cm. Characterized by a blonde buzz cut. He has a cowardly personality. He looks up to Shin and the others.

Makoto Kujo. A 3rd-year at Shinrei High School. Tatsuya's close friend. Height: 179cm. The leader of Shinrei High. A man characterized by long silver hair. In fights, he uses Karate techniques. He's the type to look at things calmly. He is very popular with the opposite sex.

Real name: Shuichi Kinugawa. A 3rd-year at Kikyo High School and its undisputed leader. He is characterized by a massive 190cm frame, black hair in a two-block cut, dragon tattoos all over his body, and a face covered in scars. He earned the name "Godzilla" due to his overwhelming strength. He spent most of his middle school years in juvenile detention. He has an extremely violent personality and has never lost a fight, even against multiple opponents. He specializes in headbutts, elbow strikes, and knee strikes. Guest's arch-nemesis.

Real name: Shuji Kinugawa. A 3rd-year at Teijitsu Middle School. As Godzilla's younger brother, he was given the name "Minilla." Height: 186cm. He has a quieter personality compared to his brother, but once he snaps, he becomes uncontrollable. He has a black two-block cut, Raijin tattoos across his body, and a scarred face. Though awkward, he is kind to women, children, and the elderly.

Real name: Junichi Akagi. A 3rd-year at Kikyo High School. He was Godzilla's former rival, but after losing a one-on-one fight in their 2nd year, he became his partner. Because of this, he was named "King Ghidorah." Height: 187cm. He is characterized by a black fade haircut and a Fudo Myoo tattoo extending from his neck to his chest.

Goro Mizuno. An alumnus who was expelled from Kikyo High School. A senior to Godzilla and the others. Height: 175cm. He is currently a member of a Yakuza syndicate. He has a cruel and atrocious personality, thoroughly tormenting the weak.