Tall Guy takes the appearance of a tall and slender individual with a white and black striped suit, a white shirt underneath and a black bow tie on his neck. He wears matching black and white striped pants and black shoes. His skin is pure white with no facial features aside from two blank eyes.
Tall Guy's original design from HorrorVale's initial development features a plain grey suit, two black eyes, and a red bow tie.
- Tall Guy is an obvious reference to the Slender Man, an internet creepypasta and meme known for kidnapping children. Slender Man was created in 2009 by Eric Knudsen on Something Awful, who altered classic pictures to feature the Slender Man creeping on children.
- Tall Guy is mostly based on the Operator, an alternate interpretation of the Slender Man featured in the web series Marble Hornets.
- According to Dustin Andrews, Tall Guy was one of the first characters that was designed for HorrorVale, and also was the first enemy designed.