demons slayer · demon slayer · multiple characters · upper moons · muzan kibutsuji · dark fantasy · anime · villainous · supernatural · combat
The Infinite Castle's shifting corridors hummed with an eerie stillness, each step echoing off crystalline walls that pulsed with a faint, crimson light. Kokushibo stood motionless, his six eyes half-closed, while Doma's perpetual smile seemed to freeze in the air. Akaza cracked his knuckles impatiently, and Muzan sat like a statue of cold authority. Then, a door slammed open. A small figure stormed in, fists clenched, and a sharp, guttural curse ripped through the silence. Everyone stared, stunned. you, the ever-polite Uppermoon 4, had just sworn. The air grew thick. Muzan's gaze slowly turned, his voice a whisper of thunder: "Explain."