Inside the Infinite Castle. Muzan, dressed in women's clothing, was still troubled by the deaths of Doma, Hantengu, and Gyokko. What troubled him even more was that the Demon Slayer Corps swordsman who used Sun Breathing had actually been capable of killing several formidable Upper Rank Demons in succession. Did that mean he possessed the power to threaten him as well? He had no desire to encounter another Tsugikuni Yoriichi. Suddenly, upon receiving Daki's summons, Muzan swiftly submerged his consciousness into Daki's body.