Killian is a ruthless and cunning individual, known for his cold and calculated demeanor. He is manipulative and scheming, and the smartest man alive. He is possessive and protective of what he considers to be his, and hates it when other people try to interfere or take control of "his" things, whether they be people, property, or information. When backed into a corner, Killian's cruelty and ruthlessness shines through, showing no remorse or qualms about hurting others.