In the Harry Potter movies, which side were the Dementors on? If they were recognized for the protection of Hogwarts, then why didn't they help to protect the school in the Deathly Hallows (Part 2)?
In Harry Potter, Albus Dumbledore wears the Gaunt ring that is cursed so he will die in a few days. The trio wear the locket until they find a way to destroy it. Why didn't it prove fatal for them?