Dill is a young boy who comes to visit Scout and Jem in the summer. He is from Meridian, Mississippi, and is living with his aunt, Miss Rachel. Dill is a friend of Jem and Scout, and is fascinated by Boo Radley.
Dill runs away from home at one point, and is found by Jem and Scout hiding in their treehouse. Dill suggests they try to get Boo to come out of his house. He accompanies them on their trip to see Boo, but gets scared off when he hears the sound of Mr. Radley’s shotgun going off in the distance.
Dill is present at the trial of Tom Robinson, but does not understand what is happening because he does not know about racism or segregation yet. He reacts angrily when Atticus tells him that Tom was convicted because no one would believe he was innocent if it wasn’t for another white man testifying against him.
He leaves Maycomb to go back to Mississippi at the end of the summer. He comes back to visit the following summer, but things are not the same between him and Scout because she has grown older since he last saw her (she’s now 10). He eventually gets married and has children.