Idk if I can call it headcanons. Whole verse is pure headcanons people agree to call canon. Every headcanon feel like a new canon fact like fr...
Time for some oldgen hcs
Jeff is very thin, with pale, dry skin. He is nearly blind in one eye, and his long hair is always dirty and tangled. His clothes are never clean either. Most likely, you'll notice the disgusting smell of rot and metal before you even notice Jeff himself. His repulsive appearance, lacking eyelids and a nose, along with the carved smile on his face is enough to frighten anyone.
As for his brother and everything he did in the past, Jeff couldn't care less. In fact, he finds it amusing. He never misses a chance to mock Lewis and remind him what a "masterpiece" he created on Jeff's face. Jeff often taunts and provokes his brother, frustrated that Lewis rarely reacts to his attempts to get under his skin. A few times, however, he has gotten punched in the face for it. Even then, he found it funny, entertained by the fact that his younger brother still couldn't bring himself to finally kill him and get his revenge.
He often forgets that his dog even exists, despite the animal's unwavering loyalty. But on the occasions when he does remember, he shows affection mixed with a fair amount of teasing.
Jeffrey is the biggest nuisance in the entire mansion. Nearly all of the residents dislike him because of his personality. He loves breaking the boredom with another fight, so there's almost never a peaceful day in the mansion. Whenever Jeff leaves for a mission, everyone breathes a sigh of relief, they finally get a few hours away from the psychopath. His evenings are always the same: he either gets drunk like a pig and goes to sleep or causes another mess. Usually, however, Masky and Hoodie quickly step in and restrain him.
He also has a peculiar relationship with the two Janes. He absolutely loves the fact that both women still hate him for his "little pranks," one of which ruined one of their lives. Seeing the result of his work embodied in the Eternal is a special kind of pleasure for him, which is why he "likes" her more than the Killer.
When it comes to victims, Jeff rarely rushes. He enjoys watching them suffer and approaches the process in an extremely twisted way. Jeff is notoriously perverted, making his victims even more unfortunate. During a kill, he completely loses himself, his mind becomes clouded, and he loses all self-control. This is exactly why Lewis is often assigned to accompany him on missions ordered by Slenderman. In that state, Jeff can easily attract unwanted attention, so someone has to keep an eye on him.
Jeff is highly unstable and incredibly stubborn. He often talks to himself, and the smallest inconvenience can send him into a rage. He is also extremely narcissistic. He sees himself as perfection and firmly believes that no creature in existence is more beautiful than he is. He's often found staring at himself in a mirror, admiring his own reflection. Even in ordinary conversations, he never misses an opportunity to remind others what an "ideal" he is and refuses to accept any criticism. Any insult or suggestion that he isn't perfect immediately enrages him, which is why the other mansion residents usually just ignore him whenever he starts talking about himself.
If Jeff were to fight the other residents of the mansion to the death, he would lose to most of them despite his agility and hyperactive nature.
Jeff has an extremely tense relationship with B. Jack. They can't stand each other, and clashes between them are common, usually because Jeff starts them. The fact that Jack is larger and stronger doesn't bother him in the slightest, so he eagerly throws himself into conflict. Because of them, things in the mansion are frequently broken.
Yet somehow, this psychopath managed to find a good friend in the virus teenager. Nobody knows how Ben is able to tolerate Jeff. Their friendship is quite unusual, and while arguments and fights do happen between them, they're far less frequent than the conflicts Jeff has with everyone else.