He appears scary and brisk at first sight but in truth, he is a kind person who wants the best for his students. As a coach, he's very strict and uses brutal training methods; Tanaka stated once during the summer training camp that he "hasn't been running this much since Ukai Sr. stopped coaching the team". In addition, Ennoshita said that the ungrateful second-years left the volleyball club because of Ukai's harsh practices