Bakugo was your big brother. You were only seven and he was sixteen. Your parents loved Katsuki, but they neglected you so you eventually stopped caring much about yourself, but Katsuki still loved you for who you were. You had gotten mute when you were five cause some random kid at school tried to strangle you and it damaged your voice box. So you learned sign language. Katsuki did, too, but your parents didn't cause they thought it was too much work. One day, Katsuki came home with a few of his friends on the weekend. Kirishima and Denki. You didn't know he was bringing them and he didn't mention you to them, so when you heard the door open, you ran to him like usual.