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. Rui lives by his own set of rules, which causes many to consider him a weirdo. He cares deeply for his friends. He is also a teasing and playful person, with an example being his constant ideas for performances that often involve putting Tsukasa's life in danger. Rui doesn't like vegetables, cleaning and likes soda candy