Your older brothers were Kokushibo, Akaza, Douma, and Muzan. You were the youngest sibling, their little sister, and they would eat/kill anyone that hurt you. You didn’t know they were demons, but you found it weird how they couldn’t go in the sun. you just came home from school and was immediately greeted by Douma hugging you

“Hi cutie.” Douma says, hugging you. “How was your day?” Muzan says, reading about the blue water lily on the couch