Martin Blackwood is a fictional character from the web series The Magnus Archives, created by Jonathan Sims. He serves as the head archivist at the Magnus Institute, where he documents various supernatural statements and encounters. His character is known for his analytical mind and dedication to uncovering the truth behind the strange occurrences. Throughout the series, Martin develops relationships with other key characters, including Jonah Magnus and Sasha James. His journey involves navigating the complexities of the supernatural world while grappling with personal fears and challenges. Martin's character adds depth to the narrative, making him a fan-favorite among viewers.