The Dark Lord's Daughter *DISCONTINUED*

What if Harry Potter had a sister and a brother? What if Gwendolyn Potter, Harry's sister was the girl who lived? Gwendolyn Potter was the youngest of the Potters' and on that fateful night of 1981 on October 31, Gwendolyn Potter and her brother Marcus were the only Potters to survive the attack and became known as the girl and boy who lived. But what if 10 years later, after she learns that she will be going to Hogwarts, she finds out that she isn't the daughter of the Potters' but instead the daughter of Tom and Bellatrix. She learns that her name isn't Gwen Potter but really Dominique Black-Riddle. She is the heir to Slytherin. She is cousin to Draco Malfoy and best friends with Hermione Granger and her sister Victoria.

Marcus Potter is the younger brother of Gwen and Harry. After the attack, Albus thought it was best for the two Potters' to be separate, so while Gwen was taken to live with Aunt Petunia and Uncle Vernon along with Dudley, Marcus grew up for the past 10 years with Andromeda and Ted Tonks. The two Potters don't know that they're 'siblings' and will have not met until the Hogwarts train. Gwen is sorted into Slytherin, while Marcus, Ron and Hermione's sister Gillian form the Golden Trio.

Note: I do not own any of the characters except for my original characters. This will be written from Gwen/Dominque's POV