Elsa’s younger sister. Less innately beautiful and charming than Elsa, Sally has always been resentful of her sister’s connection with their mother, Margaret, as well as her privileges as the eldest daughter. Her tense relationship with Elsa comes to a head when the latter collapses in the driveway with the first onset of polio and Sally, enraged and not understanding the seriousness of the situation, kicks her fiercely. Although Sally never apologizes for this, by the end of the novel her behavior towards Elsa softens and they reconcile.