ok, so i've just read like, all the answers and i've rolled them all into one...it's either Dumbledore,Neville Longbottom, Hagrid, Dudley,Tom Riddle(asuming you could change the prophacy and turn Voldemort back into tom riddle, which is also asuming that voldemort wasn't evil in the first place, which we all found out he was in hp and the chamber of secrets),some newly introduced Mark Evans kid( which i admit does sound intreging), the new DADA teacher(which seems very likely), or once again jk rowling has added a new main character once again that we have never heard of or she mentioned three books ago which makes the character list harder and harder to follow.but i don't care who it is cuz the books keep getting better. by-the-way...wtf is up with harry being such a moron in the third book? he was such an a-hole to everyone around him. i can understand cho chang being really depressed about cedric and i wouldn't have minded if he was depressed or a little bit angry but he just felt like he should take it out on everyone else... wait i'll go post that as a new question...