Boo (Arthur Radley)
Boo lives next door to the Finches, but u never meet him because he has been locked up in his house by his father for 15 years, but some times he sneaks out to leave gifts for Jem and Scout in a tree notch. Eventaly, his father finds out and fills the hole with cement. Although they never really meet Boo there was a instince when he is with them and they didnt realize it, it was when house caught on fire and Scout said she was cold and Boo gave her a blanket but she didnt realize it was him because she never turned arround to see who it was.