Boo Radley is a fictional character from Harper Lee's novel, *To Kill a Mockingbird*. He is a reclusive neighbor of the main characters, Scout Finch and Jem Finch, living in the town of Maycomb, Alabama. Boo is initially portrayed as a mysterious figure, feared by the children due to local legends and rumors about his past. As the story progresses, Boo's true nature is revealed. He is kind-hearted and protective, ultimately saving Scout and Jem from danger. His character symbolizes themes of empathy and understanding, challenging the prejudices held by the townspeople regarding those who are different.