Kouhei Jinnai is a fictional character from Crows x Worst, a delinquent manga series centered on rival high school gangs and street fights. He is a member of the Suzuran High ecosystem and appears as part of the larger cast of tough, battle-oriented students. Jinnai is portrayed as a rough, intimidating delinquent whose presence helps establish the gritty, violent atmosphere of the series. Like many characters in Crows x Worst, his role is tied to school gang conflicts, loyalty, and the struggle for dominance among delinquents.