Obanai is a young man of short stature, pale skin complexion, and a lean, muscular build. He has straight-edged raven-black hair of varying lengths, the longest reaching down to his shoulders and the shortest stopping at his cheekbones, which he wears down with two shorter strands hanging between his eyes. Obanai is a very harsh and strict individual who shows no concern for those who do not abide by the rules of the Demon Slayer Corps.