Ava Malfoy Older Twin Sister of Draco Book 1

Bashed on Sorcerer's Stone. Ava is 11 with her younger twin brother Draco. They are best friends. Draco is closer to her and their Mother while Ava is closer to both of her parents and Draco. Ava is a very powerful witch and mutant. What happens when she meets Harry Potter and sees her old friends again in years? Read to find out.