Jason wears a white vest, and ripped black pants. He has black hair with streaks of grey. He is middle aged, with some wrinkles on his face. He is very slim and is around 6'5. He has a somewhat intimidating look, and is always like that.
Not muck is known of Jason's personality. He is friendly to Dan, and has a twisted humor, remarking that nurse monsters "Eat what they can find".
- Jason is said to be visiting his brother in law, Stanley Coleman, a character from Silent Hill 3 that stalks Heather and is a patient in Brookhaven Hospital.
- He is named after the famous children's book writer, Roald Dahl.
- His actual age is never said in the story.