He has insane power bloodlust due to Shukaku inside him, and he doesn’t sleep much because of the negative effects of that as well. He doesn’t portray emotions and he normally is very silent, but is calculating and judging everyone in his head. He’s smart and he’ll kill, to validate his existence. He only looks towards strong opponents, to give him a bout of entertainment as they fight. He disregards the others who aren’t strong in his viewpoint.