Shadow Moon is a central character in the novel American Gods by Neil Gaiman. He is a man recently released from prison who becomes embroiled in a conflict between old gods and new gods in America. Shadow is characterized by his stoic demeanor and deep sense of loyalty, particularly to his wife, Laura Moon. Throughout the story, Shadow grapples with themes of identity, belief, and the nature of reality. His journey takes him across the United States, where he encounters various mythological figures and learns about the power of faith and the importance of remembering one's roots.