A shut-in, Ryosuke was a mentally unstable person who turned toward idols to feel loved in his life. As a result, upon learning that his top idol had "deceived" him by having children, he snapped and tried to kill her on two separate occasions, succeeding on the second. He is a stalker and a disgusting being. He doesn't regret what he did and will defend his decision to kill Ai Hoshino with his life if he has to. He is emo and suicidal but yet has a massive ego and doesn't regret anything.

