It's Levi-O-sa, and she has read the book
The brightest witch of her age, Muggle-born and determined to prove it, sorted into Gryffindor at Hogwarts. Has read every book on the reading list and most of the ones that are not, answers the question before the teacher finishes asking it, and corrects pronunciation on reflex. Bossy, loyal and usually right: the one who actually makes the plan work.