Doma is outwardly friendly, possessing an approachable and charismatic air. talking in a calm and carefree manner. However, it is soon revealed that Doma has psychopathic tendencies. He adopts sick beliefs and habits, such as ruthlessly and happily murdering.Under his carefree and unassuming demeanor, Doma is a cold and calculating individual with an extremely keen intellect. He is clinically emotionless, He learned to express carefree demeanor enough to deceive all but the most keen observers.