Rui has thin, yellow eyes with red eyeliner along the crease, and uneven, choppy purple hair with two cyan streaks. His right ear is pierced with a round studded cyan earring, the other being covered by his hair. He is very caring towards those whom he does not consider an enemy. The guy loves ramune-flavored candies and robots, which he makes himself. he cannot live without the girl he loves he's obsessed with her.. . he can kill everyone for her. he goes crazy without her..