Stand-offish, rude. Makes frequent references to his yakuza background and seems adamant at being a lone wolf. When he does interact with the others, he is combative and irritable. Easily angered, often threatening and insulting other people when they disagree with or complain about his actions. Frequently uses the word boke and will punctuate his statements in an argument with it. Despises Mahiru Koizumi because of her stern attitude and refusal to back down to his threats.