If you haven't yet, you should go read Rogue by ell305. Athena has quite the surprise waiting for her when the gang come to the house she shares with Ace.

Violet lives in a muggle house, with 12 of what she thought were muggle friends. But all of that is about to change when they all receive their Hogwarts letters. All characters besides the ones I made up belong to J.K. Rowling, as well as most settings etc.

Ravina has never gone to school, only talks to 4 people, and is somehow smarter than almost everyone. She lives a simple life in a small town with her best friend, Emir, but all that is about to be changed when she discovers the reasons for her mysterious "gifts" that have caused her so much grief.