Seiichirou Tougi  

Sei, 東儀 征一郎

Seiichirou serves as both the treasurer and a member of the student council alongside his sister Shiro. Despite their close relationship, he might harbor feelings of being overly protective or having a "sister complex." In the past, he held the position of president in the Japanese archery club. Additionally, Seiichirou can be quite irritable at times.