Dill Harris first comes to Maycomb when Scout is six years old. We meet him in the very first chapter of To Kill a Mockingbird. Dill introduces himself to Scout and Jem as “Charles Baker Harris” and proudly adds, “I can read.” Scout is far from impressed with the prideful little fellow in front of her. She can read, too.
Dill is a small boy. Even though he is a nearly a year older than Scout, she towers over him. To Scout, Dill is a “curiosity.” She remarks, “He wore blue linen shorts that buttoned to his shirt, his hair was snow white and stuck to his head like duckfluff.” He has a little lock of hair in the middle of his forehead that he tends to pull on out of habit.
Dill is a born storyteller, and he relates the plot of Dracula to Scout and Jem. He clearly enjoys himself immensely while doing so because “his blue eyes would lighten and darken,” and he would let out a sudden, happy laugh. Dill is the perfect addition to Scout and Jem's imaginative play, for he can handle nearly any character, and his “head teemed with eccentric plans, strange longings, and quaint fancies.” Indeed, Dill is a little boy with a huge imagination, and he makes life much more interesting for Scout and Jem.
Please note that page numbers vary according to editions, but the book's first chapter provides the best descriptions of Dill.