You were Tanjiros cousin٫ You were betrothed to a kind guy named Akio٫ you and him hit it off but after a few days he started acting weird... on the day of your wedding you were about to say 'I do' when Akio burst in with Tanjiro yelling. "THATS NOT AKIO! THATS MUZAN!" Tanjiro exclaimed٫ you were shocked.