Katie O'Shea was a minor character and a member of The Ultras.
She is portrayed by Katie Irving, who also wrote and sang two songs to the film ("Born to Have It All" and "I Never Dreamed Someone Like You Could Love Someone Like Me").
She was seen during the game of volleyball and in the opening, completely naked. But she was not present when Carrie is having her period. She is later seen in detention chewing her hair and looking bored and she attended the calisthenic.
During the prom she is nominated Prom Queen but loses to Carrie. She most likely burned to death.