Obanai's mouth is also unusual: when he was twelve, it was forcefully cut from its corners to his ears to make it appear more like that of a snake, leaving a large wound that he keeps hidden under the bandage he wears over hisiver face. Obanai is a very harsh and strict individual who shows no concern for those who do not abide by the Demon Slayer rules. fairly muscular man of short stature and a pale complexion. He has straight-edged black hair. He has one yellow eye and one blue.