Kaenjin Ouma (火炎神王魔, Ōma Kaenjin lit. Blazing God, King of Demons) was once a student in Shinō Academy and had incredible talent in Kidō, yet he had failed in becoming a Shinigami because he was unable of obtainning his Zanpakutō and after he went through a Hollowifcation process, was not allowed to be given a second chance. He has escaped before he could be captured and set for execution, because it broke one of Soul Society's laws. It is later revealed that the Hollowifcation was actually an artificial spirit that has attributes similar to a Hollow, named Weiss.