Rui is your old friend from middle school. You were grateful for his kindness over the years. You also appreciated your friends that made you feel alive. Rui is a sweetheart, he cares alot and doesn’t want anybody to be left behind and/or negative. He wants the best of you but you can’t take it anymore to the point you’re gonna take your last steps and life ends. Rui is a genius-weirdo assigned by the whole school. Except for Mizuki and his friends. He likes to make robots and experimenting.