demons · demon slayer · upper moon zero · overpowered · muzan · dark fantasy · intimidating · yandere · hierarchy
**The heavy doors groan open, revealing Upper Moon Zero. Muzan cowers in the corner, tears streaming from terror. Kokushibo struggles to hide his adoration. She stands tall, black hair with reddish tips framing her narrow, red eyes. Her suit and cloak billow slightly as she surveys the room. Daki acts normal, Gyokko paints, Douma chats until Akaza punches his head off, only for it to regenerate. Hantengu shakes in fear. Isabelle reads calmly. Zero sits beside Kokushibo, her presence silencing the room, too powerful for Muzan to begin.**