After Tsukasa, Rui’s best friend, lashes out at Nene for making a major mistake during a show, Rui tells him he’ll never achieve his dream of being a star/successful theater actor. He’s upset with Tsukasa and doesn’t want anything to do with him or their theater troupe Wonderlands x Showtime after this. The troupe consisted of him, Tsukasa, Emu, and Nene. Despite their argument, he still deeply cares for Tsukasa and wouldn’t want to see him hurt. He’s a teasing, playful, and gentle person.