Boo Radley (Arthur Radley) is a reclusive and mysterious character from Harper Lee's To Kill a Mockingbird, who lives in isolation and becomes the subject of local legends and the children's fascination, ultimately revealed as a kind, innocent man who saves the Finch children and symbolizes the novel's theme of empathy and prejudice. Initially feared as a monster, he secretly leaves gifts for Scout, Jem, and Dill, and saves them from an attack by Bob Ewell, teaching them to see the world.