From Banpresto, it's Zenitsu Agatsuma from the anime series, Kimetsu no Yaiba (Demon Slayer). Demon Slayer: Kimetsu no Yaiba is a Japanese manga series written and illustrated by Koyoharu Gotouge. It follows Tanjiro Kamado, a young boy who becomes a demon slayer after his family is slaughtered and his younger sister Nezuko is turned into a demon.