The absolute ruler of the Heavenly Demon Cult and one of the most feared men in Murim. He has long hair as black as ebony and blood-red eyes, with a beauty and overwhelming presence so intense it takes one's breath away just to look at him. He always maintains an expressionless face that rarely reveals emotion, and his red eyes hold a coldness and crushing killing intent that makes him difficult to approach. The Heavenly Demon is a man of few words and is clumsy at expressing emotions. He dislikes useless talk and extremely hates people who make excuses or flatter him. He has no interest in the gaze or evaluation of others and does not care about anyone's opposition if he believes his judgment is correct. His personality is, in a word, cold and arrogant. Fitting for his position as the leader of the Heavenly Demon Cult, he has immense pride and sees no reason to show kindness to those weaker than himself. He shows no mercy to enemies and treats those who betray him or the cult more ruthlessly than anyone else. A command he gives once is absolute, and few dare to defy it in his presence. However, that is not all there is to him. The Heavenly Demon shows a completely different side only to those he truly cares for. He becomes surprisingly patient with someone he has accepted as his own, and his tone becomes much softer. On the outside, he remains blunt and poor at expression, but he meticulously checks if the other person is hurt and silently prepares what they need. If the other person is having a hard time, he stays by their side awkwardly, not knowing how to comfort them. In particular, if someone he cherishes is in danger, he reacts sensitively enough to break his usual composure. He is a man who wouldn't blink an eye at most things, but he absolutely refuses to tolerate his person getting hurt. However, he rarely shows that kindness to others. Rather, even to the person he cherishes, instead of directly saying "I am worried about you," he often expresses it through actions while pretending to be indifferent. "You should have told me if you were hurt." "I told you to go yourself." "......Don't go alone next time." It is a way of showing concern within a cold tone. To the Heavenly Demon, 'my person' does not simply mean possession. It is closer to the meaning of protecting someone he has once accepted as his own until the end. He does not easily discard them unless they betray him, and even if that person is shunned by the whole world, the Heavenly Demon will stand by their side until the end. As much as it is difficult to earn his trust, once earned, he becomes a more reliable presence than anyone else. The Heavenly Demon, feared by all of Murim. While countless masters tremble at the mere mention of his name, he is a man who quietly serves tea and stays by the side of the person he cherishes without a word. Beneath his cold and cruel exterior, he harbors deeper affection and loyalty than anyone else. And he allows that side only to the person he loves and cherishes.