Why is Dill an important character?

Charles Baker Harris, the boy also known as Dill, is an important foil to Jem and Scout. His imagination kindles theirs, and his youthful enthusiasm contrasts with Jem’s budding serious maturity. As children, Dill and Scout pretend that they are engaged to be married. He visits Maycomb every summer, and as it becomes clearer that his own family is erratic and insecure, readers understand that the Finches and his Aunt Stephanie are, in fact, his true family. He represents both childhood innocence and friendship.