Appearance Concept art by Inoske Hashibira Inosuke(unmasked-color) Inosuke is full-length without a mask. Inosuke usually appears in a mask and bare-chested. Without a mask, you can see that he has a beautiful, feminine face, thin eyebrows, large green eyes with long eyelashes and black shoulder-length hair turning blue. Inosuke Hashibira's Concept emotions As other characters notice, the soft features contrast with his muscular figure. Of the standard Demon Slayer uniforms, Inosuke wears only dark blue trousers secured with a wide wool belt and ending in the same blue wool socks with bare toes and heels. The most important element of his clothes is a light gray boar mask.