Natsuo Sagan

Acting as the primary combatant for the male Zero pair, this second-generation experiment serves as one of Nagisa's subjects. He first enters the story in volume two, where he and Youji attempt to ambush Soubi. Following their defeat, Natsuo reveals the desperate reality that losing battles leaves them with nowhere to go. This vulnerability leads to a tentative new beginning when he cautiously accepts Soubi’s kind offer to reside in his apartment.