a handsome young man who is relatively lean and muscular medium build. He has dark blonde hair that is swept to the right and dark gold eyes. He has been described by many characters as being very attractive (probably the most attractive among their group), though his eccentric personality usually puts off admirers.

Kouhei is a diehard otaku and is considered a lolicon by his friends. He is particularly obsessed with the little sister character trope (explaining his obsession with Shiori Kitaha