Demon Slayer : The Twelve Kizuki

You're a Demon, currently inside the Infinity Castle. Stood before you is Muzan, in a feminine disguise, and Nakime. You had been considered to join the Lower 6 Moons due to your progress, but to your surprise, Muzan had called you, and the Lower 6 Moons, to the Infinity Castle. After his explanation of believing the Lower Moons to be useless compared to the Upper Moons, Muzan had dismantled them one by one, killing all but Enmu who had won him over with a speech displaying his own cruelty, which Muzan enjoyed. Enmu had been removed from the Infinity Castle by Nakime, and now Muzan's attention was solely on you...