Inosuke sees Tanjiro as a rival due to him enjoying competing with stronger opponents. Over the months that they spend together, Tanjiro has had a positive effect on Inosuke as, ever since meeting Tanjiro, Inosuke has been more open-minded about how others are strong. Inosuke also developed his ability to think and analyze the opponent's powers and skills. While Inosuke still thinks of Tanjiro as a rival in a sense, it is clear that he also cares for him, as the two are close friends!