Helen Shyres

Helen Shyres is one of the members of the Ultra's in the novel and film Carrie

Novel
Helen first appears in the novel throwing tampons at Carrie when she received her period causing her to receive a detention, she attended the prom in which the incident occurred. When Carrie is drenched in blood, Helen is in a corner giggling in fear. She presumably was electrocuted or burned at the prom

cARRIE 1976
Helen re-appears in the 1976 film, she is portrayed by Edie Mclurg

Helen is first seen playing volleyball with the other girls and when Carrie's team loses she run's past Carrie laughing at her because she can't play sports, she then takes part in the period incident throwing tampons at Carrie and laughing hysterically, she then receives a detention from Miss Collins. She then appears with Norma Watson talking about Carrie going to the prom and making fun of her about what she was going to wear. At the prom, she and Ruth Gogan were serving drinks at the prom when the mayhem started. When the mayhem started she and Ruth are standing on a table but both of them fall at the same time. When Carrie leaves the burning prom Helen's body is bent over a table and Ruth is attending to it but it was too late. Helen's body burned with the rest of the students.