Ann Jumbo Finchburg, from "The Thanksgiving Visitor," by Truman Capote, is said to be based on Harper Lee: "a sawed-off but solid tomboy with an all-hell-let-loose wrestling technique."
Atticus is based on Harper Lee's dad, A.C. Lee. While he never defended an accused rapist, he was once assigned to represent two african american defendants accused of murder. He lost. The men were hanged and their scalps sent to their victim's family. A.C. Lee never took another criminal case.
She once met Winston Churchill. In a letter recounting the meeting, she wrote "Today I met history. I met History Itself."
To explain why she didn't want to do an interview for O Magazine, she told Oprah: "You know the character Boo Radley. Well, then if you know Boo then you understand why I wouldn't be doin' an interview. Because I'm really Boo."