Actors (characters) are essential to many interactive environments, often playing parts in a story, representing you in the world, or simply guiding you through the experience. These actors come in many shapes and sizes, and they fulfil a variety of roles. When designing these actors, we can take inspiration from cinema. Christopher Vogler, a Hollywood veteran and teacher at the USC School of Cinema-Television, has written about successful cinematic storytelling and how a certain story structure and related character archetypes seem to stand out in classic films. He bases his analysis on research on comparative mythology, such as that of Joseph Campbell. Your goal is to gain understanding of what Vogler's archetypes are and how they might contribute to an engaging experience.