Kazuya Yamamura

is a first year student who looks up to thugs and gangs and wants to become a delinquent himself. He deeply admires Oga as the best hoodlum around and their first contact is when Oga and Kunieda save him and his friend Azusa from harassment by Teimou students.

Appearance
Kazuya is a tall and mildly muscular teenager who often dresses in the school uniform of St. Ishiyama High. He has short, spiky orange hair (which he dyed), brown eyes, and red piercings on his ears. Befitting the stereotypical delinquent, Kazuya also has dull eyes.

According to an image flashback of Azusa's, Yamamura used to have a black, combed back hairstyle and wore glasses giving him the stereotypical "good hardworking student" look. Until he started looking up to delinquents and had the aforementioned changes to his appearance during summer break.

Personality
He then kowtows to Oga and begs to become his underling. After some insistence and flattery, Oga ends up accepting his company. He also admires Furuichi, much to the latter's delight, calling him "The Strategist Furuichi" as he thinks that he plans strategies when Oga is fighting. His plot role so far has been mostly comic relief and as an information source on the Six Knights.

Abilities
Episode 52 reveals he has a recorder, so he may be able to play it.

Azusa Fujisaki
Azusa is a childhood friend of Kazu. Though sometimes, she is seen with a bit different affection towards him, Kazu takes her as a very good friend whom he wants to protect and keep away from harsh delinquent matters.