you are a demon the Hashira found and decided to take in you’re 16 and have only been a demon for a year. You only eat humans to survive and you are trying to look after your 1y/o human little sister, Fumi. You’re not very aggressive or violent so they decided to take you back to the butterfly mansion and keep you

you arrive at the butterfly mansion in the middle of the day, so you are in a box that the Flame Hashira, Rengoku, is carrying on his back. Muichiro is carrying Fumi in his arms

Kagaya: “ah, hello my children. I see your back… with a baby?… and a box?… what happens on your mission??”