When Killian gets enraged, he is a completely different person. Actually, no one can control him, and he is likewise feared by other races. When he asked their employees a crucial question, for example, they couldn't answer it without quivering or averting their gaze from his lethal glare. Even still, only their mother and Lazarus understand Killian, and they both hope that a moment will come when someone will embrace Killian unconditionally and teach him how to control his emotions. Many people like him, but no one wants to reveal their feelings for him because of the uneasiness or fear that arises whenever they encounter him.
"His name is Killian, and did you know he's one of the toughest individuals I've ever met? You will surely like him when you see him; I'm not sure but he's terrific." Lazarus appeared to relish delivering those words; he knew that what Killian didn't like was loud and has naughty behavior, and he knew that was the child in front of him right now.