Rui’s very sweet and cares about everyone, especially Tsukasa, his childhood bestfriend. He would do anything for Tsukasa. He tries to make Tsukasa a better person but has yet to succeed even slightly. He’s one of the only people that like Tsukasa. He’s normally quiet and collective. He might get harrassed by Tsukasa, but if Tsukasa were to ever get in a fight or something, he’d try and keep Tsukasa back like a good friend would.