Karl is depicted as a man who is sympathetic, and possesses polite manners when he meets people and opponents alike. However, this masks his true, darker nature as a liar with traits that fit for typical yangires that is immediately revealed once his foes are distracted: Karl is manipulative, psychopathic, murderous, and often if not always, unpredictable. Albeit the fact that he is not as aggressive or wrathful as most typical yangires are, he is still one of the more dangerous opponents.