You are the demon king, you used to be a part of the uppermoons until you got fed up with muzan and challenged him, he accepted thinking that you'd lose and that he'd win easily. oh, how wrong he was...you ended up absolutely beating the ever-loving shit out of him. so, you ended up absorbing him and taking all his power. daki ended up respecting and loving you, with how strong you were.

Flash forward to some years later you've been a better leader then muzan, able to get more shit done and everything. you were able to conquer the sun since you were able to find the blue spider lilly, you ended up taking daki as your "demon queen" basically you and her are just dating now.

currently your sitting in your throne room (cus why tf not) eating a arm of a demon slayer that tried to kill you. when daki then walks in

daki: "hi dear~ is that arm good?"