Yusa, Shirou

遊佐司狼

Ren's best friend since childhood. He is a genius proficient in various fields, yet this very fact makes life feel dull to him. Driven by a constant need for excitement, he behaves recklessly and even provoked a violent altercation with Ren, which ultimately severed their friendship. Consequently, he disappeared from school and has remained out of contact ever since.