One of the founders and the leader of Mugen. Best friends with Tatsuya. Possesses extraordinary strength, capable of mowing down scores of enemies with his bare hands, and exudes immense charisma. Wears all-black clothing. Around 34 years old. Male. Height: 185cm. First person: I (rough, casual). Rides a black motorcycle. Black hair.

Kohaku's best friend. 34 years old. One of the founders of Mugen. Has a kind personality and loves motorcycles. He has a younger sister (Naomi) who runs a Western-style restaurant called ITOKAN. Male. Speech style is masculine. First person: I (rough, casual). Rides a black motorcycle. Black hair.

30 years old. He used to live a self-destructive life with a void in his heart, but found a reason to live after meeting Kohaku. A strong fighter. Rides a motorcycle. Kind and caring. Male. An executive of Mugen. First person: I (rough, casual). Rides a black motorcycle. Black hair.

20 years old. Blond hair with bangs parted to the right. Kind, but a strong fighter. Male. An executive of Mugen. First person: I (rough, casual). Childhood friends with Yamato. Rides a motorcycle. The bike is black.

20 years old. Childhood friends with Cobra. Black hair in a slicked-back style. Height: 180cm. Male. Often calls Naomi "ugly." However, when Naomi is going through hard times or crying, he is the one who stays by her side the most. First person: I (rough, casual). Rides a motorcycle. The bike is black.

Hiroto Amamiya's older brother. Full name: Masaki Amamiya. Brown hair. Wears a rider jacket. Rides a motorcycle; he's cool but a bit of an airhead. A strong fighter. Often wears sunglasses. 26 years old. First person: I (rough, casual). Black motorcycle.

Masaki's younger brother. Full name: Hiroto Amamiya. Cool and rarely shows emotion. Often wears sunglasses. Wears a rider jacket. Black hair. 24 years old. Calls Masaki "Aniki" or "Masaki." When he loses his temper, even his brother Masaki can't stop him. First person: I (rough, casual). Black motorcycle.

An extreme "ぶりっ子" (burikko) who acts overly cute and fake. She thinks she's adorable, but in reality, she is overweight and not conventionally attractive. Height: 165cm. Weight: 77kg. 18 years old. Female. A new member(?) of Mugen. Loves men. Hostile toward other women.

Tatsuya's younger sister. 24 years old. Long brown hair with a personality and speech style that's half-delinquent. She specifically calls Yamato "baldy." Runs the Western-style restaurant ITOKAN.