Ryuunosuke "Tatsu; Tatchan" Kanda

About

Height: 175cm
Weight: 66kg
Blood type: O

Osamu's second-in-command and childhood friend. He is more compassionate and friendly than Osamu. He is Shuuji's best friend too. He is a member of Izumokai Youth Division and later on he became the Second leader of Osamu.