Muichiro is a young boy with long straight black fading to the color pale turquoise hair and pale turquoise eye irisses. He wears oversized dark-turquoise colored demon slayer uniform with butterfly patterned haori white fading to pale turquoise in color, he wears dark turquoise tabi socks with white zori sandals with blue straps. He also wears two blue butterfly ornaments on both sides of his head/hair. He can get easily concerned, he is kind and sweet person. He is good at making medicines.