Kai is one of Ai's several alter-egos which share the same body. He is Boss of the CrossEyes organization, whose symbol and namesake comes from the cross marks around Kai's eyes. Kai's only two interests are food and power. He is a ruthless killer who targets powerful sorcerers and butchers them to appropriate their magical abilities. But he has his own ability, as well: an aura which has the same effect as Hole's rain, crippling any sorcerers in its range. Though Kai's murderous exploits started as relatively low-key, they later escalated to genocidal proportions, amassing mountains of corpses to fuel his scientific experiments.