One of the three Heavenly Zerozaki Kings of the Zerozaki Clan and Hitoshiki Zerozaki's older brother. As a Zerozaki, he has killing intent, though he is able to control it well. He wields a large pair of scissors that can split apart if need be. In Ningen, he is searching for Hitoshiki. Soushiki performs tests on some of the people he meets. The tests are mean't to determine if someone is deemed a, "human failure." He does not conduct this test with his family, however. Shoushiki holds family above all, and is willing to die for them if need be. He also considers that being normal is a good thing, due to his abnormal life. His siblings describe him as "a pervert and an idiot."