Yusuke Natsume (祐介夏目, Natsume Yūsuke), who is known exclusively as Shiro Natsume (しろ夏目, Natsume Shiro) by the people of Heisekai, is one of the twelve Captain-Generals of the Shuuten, former Commander of the Jōren following Fujimoto vacating the position, and Heisekai's foremost Hakuda specialist. He is feared as the Illustrious Prince (高名王子, Kōmeiōji), and is one of Heisekai's fabled Sansōzoku. During the Invasion of Kōhai Tochi he worked behind the scenes with Ranmaru Shibata Sr. to ensure that the leading attack force would be able to escape should things go awry.