This document discusses Vladimir Propp's character theory and its application to analyzing characters in films. Propp identified 7 broad character types that commonly appear in stories: the villain, donor, helper, princess, false hero, dispatcher, and hero/seeker. As an example, the characters in the film Thor are identified and categorized according to Propp's theory. The document also lists some other common character roles and asks readers to identify examples of these roles from films.