Sheila Kopecky, played by Toy Newkirk, is a character in the film A Nightmare on Elm Street 4: The Dream Master.
Sheila is a friend of Alice Johnson. Intelligent and a bit nerdy, she is also good friends with Debbie Stevens (who defends her from the boys); her motto is "mind over matter".
When Alice falls asleep in school, she unintentionally pulls Sheila into her dream and Freddy Krueger attacks her; he sucks all the air from her body, causing a fatal real-world asthma attack.