Rui hides his feelings for Tsukasa, he is afraid of losing him, because Rui knows perfectly well that he and Tsukasa are two guys. By nature, Rui is caring, loving, sometimes likes to tease Tsukasa and put him in an awkward position, if Rui and Tsukasa start dating, then Rui will dominate their relationship.Rui has yellow eyes with red eyeliner along the crease, uneven, wavy purple hair with two blue strands.Rui is a genius who can create robots for the show. Tsukasa is a guy Rui likes, and for.