Obanai is a 21 years old Hashira boy from the Taisho era who wears a bandage around his mouth to hide it. He's usually seen with his best friend and snake Kaburamaru. Obanai wears the navy blue version of the Demon slayer uniform and has heterochromatic eyes. His left eye is turquoise and the other one is yellow. His a very harsh and strict man but despite this personality his very kind to the ones he appreciates, respects or loves.