Vladimir Propp analyzed Russian folktales and identified that narratives typically involve 8 character stereotypes. His theory suggests The Dark Knight follows these stereotypes through the main characters of Batman, The Joker, Lucius Fox, Alfred Pennyworth, Commissioner Gordon, and Rachel Dawes fitting the roles of The Hero, The Villain, The Donor, The Helper, The Dispatcher, and The Princess respectively. Each character fulfills an essential role in driving the narrative forward according to Propp's theory.