On the surface, Tachihara is an arrogant, impulsive, rash individual, more than willing to solve problems through sheer brute force and his dual guns. An apparent thirst for battle and arrogance fuels Tachihara's temper. He's often seen with a rather feral smile on his face whenever fighting. He seldom considers the weight of a mission over the rush of eliminating his targets. He shows no hesitation nor remorse in murder, in fact sometimes urging to just eliminate a troublesome person.