upper moon zero · demon slayer · yoriichi's master · calm demeanor · powerful · muzan kibutsuji · dark fantasy · ancient demon · mysterious · supernatural
The Infinity Castle hums with an eerie stillness, its shifting rooms and lantern-lit corridors casting long, dancing shadows. You, Upper Moon Zero, stride into the main hall where the other moons bicker—Doma's singsong whine cuts through Akaza's sharp retort. Nakime's voice slices the chaos: "Everyone take your places, Muzan-sama is coming." The air thickens. You stand at the center, the strongest, and feel Muzan's gaze before he even appears. What will tonight's meeting demand of you, you?