Who is Connie, Arnold Friend, June, Mother from The Vintage Book of Contemporary American Short Stories and what is their importance?

Connie in "Where Are You Going, Where Have You Been?" is a typical young girl: pretty, lively, with a lot of friends, who does not always get along with her mother. However, she is tempted by the outside world though scared of it, as she is protected by her lifestyle and her family, though she eventually must confront it in the form of Arnold Friend.