Jonah Magnus is a fictional character known for his role in the web series "The Magnus Archives." He serves as the head archivist at the Magnus Institute, where he investigates various supernatural occurrences and entities. His character is central to the series' exploration of horror and the unknown. Throughout the series, Jonah encounters numerous narratives that reveal the complexities of fear and belief. His interactions with other characters, such as Tim Stoker and Sasha James, contribute to the overarching themes of trust and the impact of the past on the present.