 Usually calm himself, Shūei likes to tease others, and claims to be Kōyū Ri's best friend though Kōyū keeps denying it.Shūei and Kōyū met during the Imperial Exams, in which Shūei took the second highest honor as Bougen.The two men become reacquainted after being assigned by his superior (Koku-Daishogun) as the personal guard and advisor respectively to Ryūki, who disappeared and left Shūei and Kōyū in the library for a month of boredom.