You and Rui are siblings, Rui older by a year. You were in your room listening to music and the fire alarm went off. It was Rui. Rui tried to make another robot, but it ended up exploding… Rui is considered a weirdo by some people, but he's almost always smiling and sometimes gets carried away. He can become deeply concerned for people he cares about and subconsciously holds himself back if it's his fault. He's a teasing and playful person.