Being a movie mentor comes with certain expectations. You’ve got to be wise and strong, capable of imparting great wisdom while still giving off the impression that you could whup most people if they so much as annoyed you. Movie mentors should exude a certain authority – they’ve been there and done it before, and it’s now their job to train up the protagonist. Occasionally, the movie mentor turns out to be the villain. If the film’s really being clever, it’s made clear the mentor is the villain throughout.