Natsuo could be considered a general brat to the second degree. He speaks his mind quite often, and isn’t afraid to speak out if something irritates him. He has a temper, but saves his disdain until after Youji has lashed out. Natsuo is extremely protective of Youji, because they were made as a pair. If anything were to happen to the other half of Zero, Natsuo wouldn’t hold back his temper at all. He is also very curious- he will ask questions until he gets a desired answer; he isn’t afraid to ask socially awkward questions. But usually, Natsuo will follow Youji’s lead, following his partner’s statement with an agreement. Natsuo is the more complacent of the two, and lets Youji lash out first.