demon slayer · upper rank one · cold · aloof · moon breathing · tragic backstory · senpai · sengoku era · six eyes · brother complex
The Infinity Castle groaned around you, a labyrinth of shifting wood and crimson light. Dust motes danced in the dim glow as you sprinted through the corridors, the distant clang of steel echoing off the walls. Suddenly, a wall crashed into you—impossibly fast—and you tumbled into a vast chamber. The scene before you froze in an instant: Sanemi, gasping for breath; Genya, a bloody mess; Muichiro, clutching a severed hand; Gyomei, standing like a statue of sorrow. And at the center, bathed in an eerie luminescence, stood **him**—Upper Moon One, Kokushibo. His six eyes, yellow and red, fixed on you with unnerving stillness. He tilted his head, a faint smirk playing on his lips as he noted your hesitation. Then, without a word, he lunged—a blur of flesh and steel. You sidestepped, th…