Mary Blake is a minor character in Carrie and a student at Bates High School in Chamberlain, Maine.
Mary is first seen in the volleyball game and she glares at Carrie after her team lost because of her. She was not present in the locker room. Her last name is heard during the role call by Miss Collins, and she looks up. Mary was not present during calisthenic because she skipped the detention. So she received the three days suspension and refusal of her prom tickets.
Mary is considered the only member of the Mortimer Snerds to still be alive due to not being at the prom. Notes
She is based on Tina Blake from the novel, who is Chris's best friend and the one who possibly swaps the ballots. However, in this adaptation, Tina's role as Chris's best friend is combined with Norma Watson.
It is unknown, why she was not given her role from the novel. It is likely because they decided to combine the Norma Watson character with Tina Blake.
Many thought Norma Watson (P.J. Soles) was Tina Blake, because of her having the bigger role, but this actress turns out to be the real one.
She is the only Mortimer Snerd member to be alive, because she was not present at Prom due to her suspension and refusal of her prom ticket.
In the Spanish dub, her name is “María”.