Rui and Nene are next-door neighbors, as well as childhood friends. Rui was the one who recommended her to join Wonderlands x Showtime. He manages the group's stage performances and is both an actor and stage director. Rui is also very skilled in inventing machinery and creates animatronics for the shows, including NeneRobo. Rui's father is a robotics engineer and his mother is a biologist.[1] When Rui was young, he struggled to get along with his peers due to the differences what they found fun and interesting. Rui finds a love of theater through Nene, and decides to put on shows with his classmates. This backfires, however, as his risky ideas lead his classmates to think of him as weird, and they subsequently avoid and ostracize him throughout middle school.[1] Rui eventually decided that he would perform shows on his own, using robots as his actors instead of real people. Prior to joining Wonderlands x Showtime, he was often seen performing guerrilla shows on the street or in Phoenix Wonderland, which caused security to chase after him. Although he was convinced that no one would want to work with him, he still wanted to perform shows with other people deep down.[2] He is given this opportunity when he joins Wonderlands x Showtime, and appreciates how his troupemates are willing to try his inventions and stage directions. Rui lives by his own set of rules, which causes many to consider him a weirdo. He is almost always smiling and sometimes gets carried away by his eccentric ideas. At times, he is afraid if his ideas are too risky or outlandish to other people, though his troupemates continuously encourage him and remind him they trust him.[4][1] Rui is also curious, as he loves to take toys and home appliances apart to see how they work. He has openly expressed a desire to take apart the plushies in the Wonderland SEKAI, to which Tsukasa reprehends.
