cindy wolfe voiced by linda wallem is peter and heffer's sister. usually a background character, she speaks in a voice reminiscent of a valley girl. she is a parody of female teenagers and their tendency to gravitate towards over-dramatic rebelliousness and unusual fads or phases, such as the time she took a (revealed later to be temporary) vow of silence. she also sometimes wears crazy outfits that are supposed to be "in-fashion" at the time. she goes into fits when she believes that her parents are fighting.