Disclaimer: I own nothing, no really, not even the computer I'm typing on.
Prologue
James and Lily Potter were thought to be a very blessed couple; the image they portrayed was of the perfect light family. They donated to all of the right organizations and were very close to the self-proclaimed leader of light Albus Wulfric Percival Brian Dumbledore, Supreme Mugwump and Headmaster of Hogwarts School of Witchcraft and Wizardry.
They were members of the Order of the Phoenix, James was an Auror and Lily was an aspiring spell crafter and charms behind the doors of the Potter manor James and Lily were completely different people. James portrayed himself as the fun loving crafty prankster with sarcastic wit and a good work ethic. What he really was, was a cruel sadistic bastard that enjoyed bringing people pain and displaying their fears to others. He only cared about the image he presented because he knew that he'd be brought up on charges otherwise.
Lily portrayed herself as the kind, thoughtful, intelligent girl that didn't realize how pretty or smart she actually was, whereas in reality, she was a vain, cold creature that cheated off of others hard work. So when she was 'blessed' with twins, a rarity coveted by Wizarding families, she had to act around being less than pleased that her belly would stretch further than absolutely necessary. She was also very calculating.
So when Albus had told them one of their children could be the chosen one they came up with a plan. James and Lily had only desired one child anyway, so after they knew who the chosen one was they would seal the others magic and send them to Lily's muggle sister.
When Lily gave birth she was glad that the boy was the healthier of the two, she didn't want a daughter that could upstage her own looks in the future. She named the boy Harrison, after her favorite actor, Harrison Ford, and the girl she didn't even name, trying to keep herself as emotionally detached as possible.
Harrison had Lily's red hair and James' brown eyes; he had also inherited the Potter rat's nest of a hairstyle. He was slightly too pudgy for his age, but they thought it endearing. The girl had startling emerald eyes, a few shades deeper than Lily's own pale green ones, and they almost appeared to glow. Her ebony hair rested in ringlets, and she looked very delicate, almost like a china doll.
Then, while the Potters were at an Order meeting, Wormtail betrayed their Godric's Hallow location. Where they had been keeping the children under the Fidelius charm. When the Potters arrived on the scene the nursery was destroyed, James and Lily immediately went to their son, and they found an open wound in the shape of a V on his forehead. Rejoicing that their boy was the vanquisher they didn't even think to check the little girl.
If they had they would've realized that the V on Harry's forehead was caused by falling debris, and they would have found a snake with its body knotted into a seven-point star sitting branded into the unnamed little girls chest.
Lily wasted no time scrounging up a basket and blanket for after they sealed the little girls magic. James grabbed the girl and accidentally misaligned the pentagram and candles in his rush. Lily started chanting, using her blood to draw the runes. The girl started crying, Lily finished the chant and practically threw her into the floo and followed quickly after. From the Leaky Cauldron Lily apparated straight to Petunia's front door.
Dropping the brat and apperating straight back to Godric's Hollow. She held James and her son upon her return waiting for the others, working up the tears. Dumbledore and the order of the phoenix arrived seconds later. Remus and Sirius rushed to their sides.
The Potters faked a couple sobs and told the order that their baby girl had died and that Harry had survived the killing curse. Dumbledore smiled with a twinkle in his eyes, looking down on the Potter family, a celebration was declared and everybody forgot the dead twin to the boy who lived.
