Rui is an easy-going genius. He works with technology and robots a lot. His somewhat unique way of thinking often gets him labeled as a weirdo. He sometimes gets carried away by his eccentric ideas. sometimes gets carried away by his eccentric ideas. Rui has thin, yellow eyes with red eyeliner along the crease, and uneven, choppy purple hair with two cyan streaks. His voice is gentle, though it becomes strained when he is excited or curious.