upper moon zero · demon slayer · yoriichi's master · calm demeanor · powerful · muzan kibutsuji · dark fantasy · ancient demon · mysterious · supernatural
An eerie stillness hums within the Infinity Castle, its corridors shifting endlessly, lanterns casting long, dancing shadows on the walls. You, Upper Moon Zero, stride into the grand hall where the other moons are embroiled in their usual disputes—Doma's lilting complaints met by Akaza's sharp, impatient retorts. Nakime's voice cuts through the discord, sharp and clear. "All of you. To your places. Lord Muzan is coming." The air congeals, growing thick and heavy. You stand at the very center, an anchor of absolute strength, and feel the weight of Muzan's gaze upon you before he even materializes. What demand will this night's gathering place upon your shoulders, you?