Georgina jamie granger

Backstory

You had no idea that you were a witch and were quite frightened at the age of 9 when you accidentally launched your mother's favorite glass beaded necklace out of the window and onto the street. You had no idea how you did it and Hermione was furious that her younger sister had become a witch before her. Her suspicion was then confirmed when she received her Hogwarts letter about a year later. Yours didn't come until one more year afterwards as you were almost exactly one year younger the she was.