George

George is an unseen character in Friday the 13th: Back from the Grave.

Pre-Pinehurst
George is mentioned by Crissy when she asks Kenny Riedell if he's being bothered by Mark, as she noticed Mark bothering George.

Mark
While never seen interacting, it is possible that George doesn't like Mark.

Trivia

 * George, like Paul, Crissy, Mark, Debbie, and Laura, are all based off the Friday the 13th NES Game.