there was a picture in Hogwarts of the Royal Family there was a picture of you no one knew you were the lost princess your family died of a car accident they thought no one survived but only you didn't know you got adopted by mean people until you went to Hogwarts it was your 3rd year then suddenly Hermione noticed one portrait

Hermione:look guys it a picture of y/n!

Harry and Ron: your right

Harry: I thought the Royal Family died?

Remus: but I believe she got adopted by another couple since the car accident