The Other Marauder

This is the story of Cassie Levesque, the 5th Marauder. She was taken to the orphanage when she was a baby, only she's different. The Carers at the orphanage know about magic and do everything in their power to stop her from finding out that she is a witch. Until, things take a turn for the worst and they are forced to call the headmaster of the local wizard school, Professor Albus Dumbledore. What happens when she meets the Marauders? What friends will she make? And more importantly......which enemies will be foolish enough to cross her path?
PLEASE NOTE: This story will not contain Peter Pettigrew because I cannot stand him and I won't be able to write about him. He will probably be mentioned as a friend but not as a Marauder.