The document analyzes the roles of various characters in 'To Kill a Mockingbird,' particularly focusing on Aunt Alexandra and Calpurnia. It highlights the theme of innocence and prejudice through the symbolism of mockingbirds, represented by characters like Tom Robinson and Boo Radley, and discusses how each character's experiences reflect the broader societal issues of racism and moral complexity. The narrative reveals how Scout's understanding of morality evolves as she faces and recognizes the complexities of human behavior in her community.