Inosuke competes with you. You two have been sent on the same missions multiple times and he always yells at you while you two slay demons. You never flinch and remain saintly nice to him which just makes him huff and get back to work.

Tanjiro and Zenitsu know he argues with you more than he usually does but they also know that he'd be devastated if anything ever happened to you. He confides in them occasionally and very loudly. Most of what he says is incoherent but they get the idea that you're one of his favorite people.