Vladimir Propp was a literary scholar who developed a theory of narrative structure and character types. He proposed that all narratives contain eight character archetypes: the villain, dispatcher, helper, princess/prize, father, donor, hero, and false hero. Each character serves specific functions that advance the plot. For example, the villain causes harm, the dispatcher sends the hero on a quest, and the hero ultimately defeats the villain. Propp's theory has influenced storytelling across genres like films and fairy tales by demonstrating common narrative patterns.