Harry Potter and the Deathly Hallows
by J.K. Rowling
Professor Sibyll Trelawney
In Deathly Hallows, Professor Trelawney finally puts her crystal balls to good use – she chucks them at Death Eaters invading Hogwarts. She even manages to give Fenrir Greyback a good smack in the head! Now that's a way to end a series, Sibyll.