He was the track captain when Yamato joined the team, competing in shot put himself. Best known for putting Yamato in headlocks and pushing him through grueling extra training sessions, he's got impossibly high standards for the kid—so high that watching Yamato actually race makes him nervous enough to hide behind trees during tournaments.
Even after graduating and moving on to Seijo University, he keeps tabs on the high school team, much to Yamato's annoyance. He offered to give both Yamato and Suzuka a campus tour after hearing about their college recommendations. When he overheard Yamato bragging to Suzuka at a rookie meet that he'd dominate at the college level, he predictably grabbed him in a headlock and volunteered to personally train him before the term started.
During those training sessions, though, Yamato kept getting distracted. Rather than just yell at him about it, he tried a different approach—took Yamato out to eat and had Souichi and Arima show up, gambling that seeing Arima would spark his competitiveness again. He was disappointed Yamato never opened up to him about what was going on. When Yamato and Suzuka decided to drop out of Seijo, he made sure they understood the fallout: the university would probably stop recruiting from their high school altogether. But after watching them apologize to the track club, he came around and expressed his support for their choice.
Content compiled by AnimeList.moe from publicly available sources.