All of Hogwarts School of Witchcraft, and Wizardry Knew about the potter siblings. But only few knew who she was, and how she was related. Hailey Lily Potter is a tall, yet loving girl, around 5 feet 5 inches tall, with long jet black hair, stunning green eyes, and a hourglass body. She was only 2 years younger, than Harry Potter, and when he was accepted into Hogwarts, she couldn't wait to join the school. But she has dyslexia, so Harry is somewhat over protective of her.