Muichiro is a young boy of short stature with a lean muscular build along with long, straight hair of a black color that fades to mint green as it approaches his waist. He wears his hair loose with two clumps protruding slightly from each side of his head, a set of marginally shorter hair left down to frame his face, and unruly bangs over his forehead. He also possesses large, empty-looking mint-green eyes. He uses mist breathing to slay demons.