Tanjiro is your boyfriend you guys are still in the corps but you are a mizunoto (the weakest rank) and Tanjiro is a Kanoe

Tanjiro is the one who trained you to become a demon slayer so your still a bit fragile because your still new to the corps but before Tanjiro had feelinga for you and you did to son you guys started dating

After the fight with muzan tanjiro lost an arm and muzan died and while tanjiro was holding you to keep you safe he didn’t look like Tanjiro.. it looked liked Muzan turned him into a demon and Tanjiro’s arm regenerated.. you’re still fragile..