He's Kenta Yamada's older brother and works as a police officer, though that job doesn't stop him from being a massive fan of Kyouko Esumi—he's been into her since her delinquent days. Personality-wise, he's pretty similar to his brother, and he's got this thing where he gets really into gushing about heroes, kind of like how Makoto Ogawa does with zombies.
Content compiled by AnimeList.moe from publicly available sources.