Mimir is a wise, witty, and talkative character in God of War Ragnarök, known as the smartest man alive. Once a counselor to Odin, he is now a severed head who accompanies Kratos and Atreus on their journey. He serves as a guide, storyteller, and source of lore about the realms, gods, and prophecies. Mimir provides humor, insight, and moral perspective throughout the story, helping the protagonists navigate conflicts and understand the larger stakes of Ragnarök.