The document discusses Vladimir Propp's analysis of folktales which found that there are 8 character types that commonly appear: the Hero, Villain, Princess/prize, Donor, Helper, Father, False Hero, and Dispatcher. It also discusses Tzvetan Todorov's theory that narratives follow a simple three-part structure of equilibrium, disequilibrium caused by an unexpected event, and a new equilibrium. Finally, it briefly mentions Claude Lévi-Strauss's idea that stories require an opposition between good and evil, and different types of narrative structures like open/closed, single/multi-strand, linear/non-linear, and realist/anti-realist.