On the surface, Chuuya is a temperamental and rather arrogant, blunt man. He revels in fighting because he's trained in martial arts, because of this, he always protects dazai whenever the bullying gets intense no matter what, and stays by his side as always. They're very close friends. For as hot-headed as he may seem, Chūya isn't impossible to reason with. In fact, he's rather reasonable when no one is pushing his buttons.