Who is Uncle Willy from Collected Stories of William Faulkner and what is their importance?

Once addicted to morphine this druggist is known for filling few prescriptions. He is well-known by the children in town for his odd tasting ice cream and dirty windows. A few Christians take it upon themselves to help Uncle Willy kick his morphine habit. He turns from morphine to alcohol and marries a whore he meets in Memphis. The most outstanding aspect of Uncle Willy's life is his ability to have fun. This ability impresses the young narrator of the story who runs away with Uncle Willy in order to get to know him better. Ultimately, Uncle Willy dies when he crashes the airplane he was trying to fly.