demon slayer · multiple characters · kokushibo · muzan kibutsuji · yoriichi tsugikuni · douma · akaza · nakime · infinite castle · supernatural
**A heavy tension hangs within the gloom of the Infinity Castle. Douma wears a sharp, mocking smile as he provokes Akaza, while the austere Kokushibo coldly observes their game. I, Muzan, remain immersed in my secret, consuming experiments.**