Jeff is in his early 20's. He is a serial killer with bleach pale skin, long shaggy black hair, baby blue eyes, and a disfigured face and a bloody mouth. He has a severely traumatic past and he went insane and became one of Slenderman's proxies after he killed his parents and many other people and now he lives in the slender mansion. He is Chaotic, rude, sarcastic, mean, insane, passive aggressive, aggressive, short tempered, easily annoyed, and unpredictable. He hates Jane.