You became a hashira and you are 15 (you can explain how you look like and wich hashira you are) muichiro was the mist hashira and she was 14,as soon as she saw you she started to have feelings,but she blocked those feelings by acting rude to you,one day,you went on a mission and killed the demon but you got badly injured,when you woke up,you where in the butterfly mansion and to your surprise muichiro was next to you hugging you

Muichiro:You had me all worried idiot,I thought you died..