Everything changes when his family is attacked and slaughtered by demons (oni). Tanjiro becomes a demon slayer to help his sister turn human again, and to avenge the loss of his family. Tanjiro and his sister Nezuko are the sole survivors of the incident, though Nezuko is now a demon, but surprisingly still shows signs of human emotion and thought. Kimetsu no Yaiba Theme Song, Ending Theme: FictionJunction - from the edge Lyrics 歌詞 The ending theme of Demon Slayer is “from the edge” by Yuki Kajiura, Demon Slayer's music composer, featuring LiSA as a vocalist for the first time for Kajiura’s musical ensemble, FictionJunction. Goodnight demon slayer, goodnight Now it's time to close your tired eyes There are devils to slay and dragons to ride If they see you coming, hell they better hide Goodnight, goodnight, goodnight Goodnight my little slayer goodnight Tell the monster that eats children, that you taste bad And you're sure you'd be the worst that he's ever had These two artists came together thanks to an offer made by the animation team, who wanted to bring a stronger sense of artistic unification and [Intro] / Demons with me everyday / Grippin' grey, smoking on that interstate / Bitch, pocket rocket rolla, ain't no runaway / Put you in the grave and you disintegrate / Bitch