Kathryn is the attractive strawberry blonde leader of Zeta Sigma Tau, the most popular sorority in Arlen, Texas. She and her best friend Ellie are both legacies of the sorority, with their mothers and grandmothers having been sorority members. Kathryn is very elitist and has a secret handshake and sorority anthem. There is a rumor that Zeta Sigma Tau members are promiscuous which irritates Kathryn. Kathryn and her friends have a tendency to mock girls they see as lesser than them.