When James and Lily Potter died that night, they hid their most valuable secret. In the crib where Harry stuck his head out, Haley Potter covered his head with her hand. As a result, she does have a scar on her hand. But Harry never knew. Or Harry didn't want the world to know.
"Haley, you have to go," -Hope Evans, Chapter 3.
Harry Potter has a twin sister, but he never spoke about her. He never knew his sister existed until years later.
"I look at Harry, not willing to tell him what I had just found out. I can't tell him. He has too much going on inside his head."- Haley Potter, Chapter 20.
"What will I do during hard times? I'm not bright, not one bit, but I know The Boy Who Lived would put himself out there without a thought..."-Severus Snape, Chapter 10
"Your parentage doesn't shape you,"- Fred Weasley, Chapter 3.
Haley Potter made the most unlikely of friends. She became best friends with Sol Prewitt and Neville Longbottom in her first year at Hogwarts, and despite their differences, they cracked the codes.
"You get me, Neville, like how?" -Haley Potter, Chapter 3.
Haley was in a foster home before she got her invitation to Hogwarts. She makes the most unlikely choices when you compare her to Harry. They are polar opposites. When she gets her first dose of kindness, she's addicted. Now, she wants to change the world and serve the greater good.
"Geez, too focused on being a hero?" Sol asks, winking, "I can Haley keep up." -Sol Prewitt, Chapter 21
The great Harry Potter, defeater of Voldemort, the boy who lived. Not a single thought went out to his older sister for years, yes an older sister.
Belle Lily Potter, a year older than Harry. She was sent away when the Order of the Phoenix found out Harry and their parents were at risk. For years she had been living in America attending Ilvermorny, until she was nearly discovered by a death eater. Now she lives with family friends in France she is attending Beauxbatons for her fifth year. She know about Harry and often checks in on him with Dumbledore as her messenger. Harry of course knows nothing about her, and that's how it needs to stay, even the knowledge of Belles existence places her in unthinkable danger. She remains the not so perfect Potter.
Beauxbatons is extremely hard to fit in when you're the only girl who has no Veela in her. But what she can do is Legilimency, where she is able to read any mind she comes across if she wishes and she inherited her father's animagus ability.
Harry may look remarkably like his father and has his mothers eyes, but Belle is an exact replica of Lily Evans, down to every last freckle. But when they travel to Hogwarts for the Triwizard tournament, will she finally get to see her younger brother for the first time since that night.