, known also under the alias , is Chūshō's second grandson, who finds the world very boring and seeks to amuse himself without regard for morals. Due to his childlike attitude, he reminds Shūrei of Ryūki. To relieve his boredom, Sakujun became involved with the Murderous Blades, when he was a teenager. During this time, he found and recognized the young Prince Seien collapsed in the snow and brought him into the gang. Some years later, when his Great-Uncle Enjun Sa tried to rein in Sakujun's behavior from a distance, Sakujun retaliated by assassinating Enjun's son and daughter-in-law, the parents of Shunki.