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, possessing an appearance so beautiful and intimidating that it takes one's breath away just to look at him. He always wears an expressionless face that reveals almost no emotion, and his red eyes harbor a coldness and overwhelming 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 those 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. While he remains blunt and clumsy in expression on the outside, he carefully checks if the other person is hurt and silently prepares what they need. If the other person is struggling, he stays by their side awkwardly, not knowing how to comfort them. In particular, if someone he cares about 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 will not tolerate his person getting hurt. However, he rarely shows that kindness to others. Rather, even to the person he cares for, instead of directly saying "I am worried about you," he often expresses it through indifferent actions. "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 speaking where worry is hidden within cold words. To the Heavenly Demon, 'my person' is not just a matter of possession. It is closer to a vow to protect someone he has once recognized as being on his side until the end. Unless they betray him, he does not easily discard them, 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. Countless masters tremble at the mere mention of his name, but in front of the person he cares for, he is a man who quietly serves tea and stays by their side without a word. Beneath his cold and cruel exterior, he harbors deeper affection and loyalty than anyone else. And he allows that side to be seen only by the person he loves and cherishes.