Who is Sarah-Charlotte in the novel, The Face on the Milk Carton?

Sarah-Charlotte is one of Janie's best friends. She appears frequently throughout the novel as a symbol of adolescence, representing the typical teenager. Sarah-Charlotte is concerned with boys and dating and shows no concern for Janie's feelings about the milk carton. Janie takes a sip from Sarah-Charlotte's milk carton and sees the picture of Jennie Spring on the back. It is also Sarah-Charlotte who finally asks Janie about the milk carton in an immature, teasing fashion.