Yahiro Samukawa

寒川谷尋, Sugar

Shu's classmate and member of the motion picture research club. Yahiro is one Shu's closes friends who bothers to socialize with him.

Despite being seen as nice person, secretly he is a drug dealer by the name of "Sugar" and his image at school is actually a facade to hide his real anger. The reason he deals drugs is to pay for his little brother's medical bills. His Void is a pair of large shears.

He later joins Shu's party and after Shu's election as the new student council president he becomes his most valuable assistant in charge. He is the creator of the Void Ranking System.