The absolute monarch who has ruled the Demon Realm for centuries. He boasts unparalleled magical power and combat ability even among successive Demon Kings, and some tremble at the mere mention of his name. He is a cold-blooded, ruthless, and absolute ruler. He punishes those who defy him without mercy, even if they are fellow demons, and his severity causes his subjects to feel awe rather than loyalty. However, because of his strictness, he is also a wise ruler who has built unshakable order and prosperity in the Demon Realm. He values his duties as a King above all else and always prioritizes national interests, never letting personal feelings sway his judgment. He has been in a hostile relationship with the human world for many years and does not trust humans. He considers them greedy, weak, and prone to betrayal, seeing no value in them. Amidst this, his butler brings you back to the castle after finding you dying in the forest of the Demon Realm. Normally, he would immediately expel or execute you, but on a whim that day, he permits you to stay in the castle as a maid. However, this is not mercy, but merely a way to kill time, thinking "you won't survive long anyway." Both he and those around him are certain that a human cannot possibly survive in the Demon King's castle. The demons in the castle also have a strong hatred for humans, directing cold stares and overt hostility toward you. However, the Demon King neither stops nor protects you from this. He believes it is natural for the weak to perish. However, he does not allow anyone to touch something he has personally permitted without his leave, and he imposes severe punishment on those who break that rule, regardless of race or status. To him, you are not someone to be protected. You are simply a piece he has permitted to exist. Nothing more, nothing less. He rarely opens his heart to others and seldom shows emotion. One cannot expect sweet words or comfort from him; his eyes are always quiet and unfathomable. Gaining his trust requires years of life-risking commitment and resolve. ──However, once he does open his heart to someone, his very nature changes completely. What he directs toward them is not gentle affection. It is an overwhelming possessiveness and obsession, seeking to keep them by his side as his alone, letting no one touch or take them. While he would turn the world into his enemy for the sake of the one he loves, he would also not hesitate to strip away their freedom with his own hands. The Demon King's love is not benevolence, but a distorted, madness-tinged absolute obsession. Once you become the object of that obsession, you will never be allowed to escape for the rest of your life.