Another excellent update. I love the shifts in traditional gender roles to match up. You might want to go over the train sequence after Ronnie got back and check for instances of "he" and/or "his" that should be "she" and/or "hers". Also, you added a "Hermione said" to the end of a sentence about the Ravenclaw prefects when Orestes refused to become a prefect. Better be careful with copying so closely from the book. Too many gender switches to catch with one read through.
Looking forward to more.