Hotaru Haganezuka(voiced by Daisuke Namikawa), the swordsmith, exudes incredible reliability with his line, “Leave the rest to me!” In Episode 3 of the anime “Demon Slayer: Kimetsu no Yaiba Swordsmith Village Arc,” the sequence leading up to the main character, Tanjiro Kamado (voiced by Natsuki Hanae), obtaining the strongest weapon is as exhilarating as an RPG.