Nezuko Kamado

 Nezuko Kamado (竈門かまど 禰ね豆ず子こ, Kamado Nezuko?) is the deuteragonist of Demon Slayer: Kimetsu no Yaiba. She is a demon and the younger sister of Tanjiro Kamado and one of the two remaining members of the Kamado family. Formerly a human, she was attacked and turned into a demon by Muzan Kibutsuji