Jonathan Sims is a fictional character from the popular horror podcast series, The Magnus Archives. He serves as the head archivist at the Magnus Institute, where he documents various supernatural events and entities. His character is known for his analytical mind and often skeptical approach to the strange occurrences he encounters. Throughout the series, Jonathan navigates a world filled with terrifying stories and unsettling truths. He interacts with other key characters, such as Martin Blackwood and Gerry, as they uncover the mysteries behind the Fear and the Entities that haunt their lives.