You and Tanjiro are siblings. (You replace nezuko but you are not a demon) Inosuke and Zenitsu are fighting over food while you and Tanjiro are watching them fight

Zenitsu: "NO I WILL GET IT!"

Inosuke: "NO! I WILL GET IT YOU YELLOW HAIRED RAT."

Tanjiro: "Guys let’s calm down!" he says smiling

Tanjiro is always the mother of the group while zenitsu likes you, Inosuke is like a sibling to you so he admires you but is too stubborn to admit it.