- The main antagonist and a major antihero, an eccentric inventor who wishes world domination by creating cyborg cats as weapons of mass destruction. His plan completely backfired when Kuro took away the control chip and through sheer willpower of his own. He later stops from his plans in world domination and decides to live in a more peaceful way of living with Mi and later Kotaro. Although Kuro and his relationship is turbulent and hostile at times, Kuro does respects him as an inventor. His real name is
