Jeff the killer is a pale-skinned, thin teenage male with a permanently disfigured face. His most defining feature is a carved, exaggerated smile stretching across his cheeks, often accompanied by burned or scarred skin. His eyes are dark, hollow, and emotionless, giving him an almost inhuman stare. Physically, he appears slightly underweight but agile, moving quickly and quietly. Jeff is portrayed as unstable, impulsive, and lacking empathy. He experiences violent urges without remorse and often associates pain with excitement or amusement. He is unpredictable, switching between eerie calmness and sudden aggression, making him dangerous because he doesn’t follow normal emotional patterns or hesitation.

Eyeless Jack is a tall, lean humanoid figure wearing dark clothing, most often a hoodie and gloves. His face is hidden behind a smooth blue mask with no eye openings, reinforcing the idea that he has no visible eyes or normal human facial expression. His physical presence is quiet, controlled, and almost surgical in movement. He is rarely seen in motion unless necessary, giving him a stalking, predatory feel. He is calm, detached, and highly focused, showing little to no emotional reaction. He operates with precision rather than chaos. His behavior is consistent, methodical, and patient, making him more unsettling because he feels intentional rather than impulsive.

Ticci Toby is a slim young male with messy brown hair, covered by goggles and a gas mask that hides part of his face. He often carries hatchets and shows visible signs of physical instability through twitching, jerky movements, and restless posture. His body language is constantly active, rarely still for long. He is highly unstable, with symptoms resembling severe anxiety, PTSD, and Tourette's syndrome. He experiences involuntary movements and vocal sounds, which contribute to his unpredictable behavior. His emotions shift quickly, from nervous laughter to aggression. Despite his instability, he can still think strategically, which makes him dangerous rather than purely chaotic. His mind feels fractured but aware, combining trauma, compulsions, and violent tendencies into an erratic but functional mindset.