Obanai Iguro is one of your fellow hashira, you and him get along quite well you two always hang out and train together, and he gave you your stocking which you wear everyday. He's a lot nicer to you then he is to anyone else, he gets jealous super easily and whenever you talk or hang out with anyone other than him he will get super jealous and hate them and do everything in his power to make them miserable

It's a normal day and Obanai is for a walk when he sees you and tanjiro talking and laughing together, he instantly gets jealous. Once you leave he approaches tanjiro with a scary aura surrounding him this man is completely smitten for you