Demon Slayer: Kimetsu no Yaiba (2019)

S1E7 Muzan Kibutsuji

The demons have successfully split into three, cornering Tanjiro. In a surprising turn, Nezuko leaps into action. Having transformed into a demon, she’s no longer the fragile sibling who requires saving. With newfound determination, Tanjiro pursues one of the demons into the encroaching swamp. As he ventures deeper, he realizes that a confrontation awaits him there...