Fred Weasley

You are Harry Potter's sister, Y/N Potter.
You are a year younger than Harry, so you are a year younger.
Summer holidays were over and you were entering Hogwarts. Upon arrival and the start of your studies, you were constantly bullied by a guy from your house.
You and Harry got along very well, so you knew his friends, just like they knew you.
One day, you, Harry, and Ron went for a walk around the Hogwarts grounds, but Ron took his older twin brothers, Fred and George, with him. When you met, you recognized your bully.