There is one person who he cares deeply about; Mitsuri Kanroji. He has a crush on Mitsuri, as he often lets his feelings shine through by sharing meals with her and giving gifts, such as the green socks she wears with her uniform. Obanai seems to let his overprotectiveness of Mitsuri show at times, such as when he threatens Tanjiro for growing too close to her. It was implied that he has a crush on Mitsuri because of her cheerful personality.