Nene's neighbor and childhood friend, Rui is an easy-going genius. He's meticulous about making every show the best it can be, making use of his flair for technology and inventiveness. He even builds robots to use on stage. His somewhat unique way of thinking often gets him labeled as a weirdo.During one performance, an accident happened while saving his friend Tsukasa, Rui himself suffered a severe head injury and amnesia. He remembers only his childhood, but no friends and troupe.