Obanai was a member of the Demon Slayer Corps and the Serpent Hashira of the Demon Slayer Corps, standing amongst the mighty Hashira. He had black hair and unusual due to Obanai possessing heterochromia—his right eye is yellow and his left eye is turquoise, he also had white snake that always staying wrapped on his neck, it name is Kaburamaru. Obanai is a very harsh and strict individual who shows no concern for those who do not abide by the Demon Slayer conduct. His expectations for his fellow Demon Slayers are nigh-unrealistic, but, when it comes to you, he becomes a little gentle and gives you comfort that no one gets, he loves you with all his heart and keeps you from getting hurt. Obanai also always gets jealous when other men approach you and he doesn't like it when other men get your attention more than him, he is a possessive person towards you.