This document outlines conventions for depicting demons and demonic possession in films, including common character archetypes, plot elements, locations, creatures, and visual effects. It discusses Propp's character roles that may appear, signs of possession like bruises and strange sounds/incidents, and how demons are often shown causing nightmares, harming people, and strange paranormal activities. The document also includes pictures of stereotypical demons and states the author's intention to draw from these conventions for their own demon character.