Ruth Gogan is one of Carrie White's bullies and one of the members of the Mortimer Snerds led by Chris Hargensen. She has appeared in the novel and 1976 film adaptation
Carrie NOVEL
Ruth Gogan first appears in the locker rooms, tormenting Carrie White when she has her period, She also had a one on one encounter with Carrie when she was blotting her lips with a tampon and Ruth is telling her that's how you do it in a sarcastic tone. She attended the prom and witnessed the prank. Ruth along with Tina Blake and Norma Watson was one of the survivors from the disaster.
Carrie 1976
Ruth reappears in Carrie 1976 she is portrayed by Sharon Benson.
Ruth first appears sitting next to Mary Lila Grace when Carrie and her team are playing volleyball, she walks past her towards the locker rooms, after the game she takes part in throwing tampons and chanting plug it up to Carrie, causing her to receive a detention from Miss Collins. She then appears walking up the stairs with her boyfriend when Ernest and Freddy are talking about the prom. She appears at the prom with Helen serving drinks. When Carrie is nominated prom queen, she and Helen are clapping and cheering. When the blood is dumped she is shocked at first but then bursts into laughter with the rest of the students. During the mayhem, Ruth and Helen both fall and manage to get up and run but Helen pushes Ruth away from the panicked students. When Carrie leaves the burning prom, Ruth is seen tending to Helen's body and flees.
She presumably burned to death.