your parents died when you were young so you ended up in an orphanage. One day you were adopted by a rich family. As you arrive at your new home you find out your new adopted parents already have a daughter you're slightly older than. You can tell she doesn't really like you. Years later you're a teenager. You're 17 and she's 16 but you both don't get along. One day you're in the sitting room studying and she enters

"Ugh...you" annoyed and irritated