Creepypasta Canon Facts

Slenderman

The Slenderman is a widely popular internet urban legend, horror icon, and very commonly the titular main antagonist of many stories involving him. Slenderman is a humanoid creature with a vast array of supernatural powers and abilities, his most common hobbies include kidnapping children and brainwashing innocent people into becoming his proxies. Due to his popularity, Slenderman has been seen as one of the most famous urban legends and horror icons of the internet.

Appearance: Slenderman's general appearance consists of a tall figure standing from 6 to 14 feet tall wearing a black suit, white shirt, a black or red tie, black trousers, and black shoes. Slenderman's skin is pale white, and he has no facial features of any kind, although some depict him as having somewhat empty visible eye sockets, nose, and mouth. Slenderman is also iconic for having long black tentacles which he usually uses to snag in victims. However, it is possible that this is not his real form, and that he is actually an eldritch being whose true form cannot be comprehended.

Personality: Due to Slenderman's history being completely unknown, it is hard to determine just what he is thinking, although he is commonly seen as a cruel, sadistic, manipulative, predatory, misanthropic demon. It is entirely unknown if Slenderman actually cares for his proxies' safety, or if he's just using them in order to get what he wants, showing his controlling and tyrannical personality. Due to Slenderman being such an enigmatic figure, it is entirely unknown if he is indeed malevolent, or if what he does is true, leading others to portray him in an anti-heroic and benevolent way, and is only taking children in and brainwashing people simply to show them his ways in trying to be better than the current state of humanity. This leads to another popular variation of the Slenderman, commonly used in AUs, headcanons, and fanfiction, portraying him as a fatherly and typically caring personality to other villainous Creepypasta characters, usually getting irritated by their antics and controlling what goes on, typically in a mansion.

Powers & Abilities: Many stories seem to indicate that The Slenderman can control a person's mind, which became the basis for the Proxies in the video ARG, a trend that later spread to Slenderblogs. The Slenderman also originally had stronger connections to children, and many of the original stories revolved around disappearing children or featured Slenderman sightings in photos with children. This was often attributed to the innocence and morbid curiosity of children, which could lead them down the path of discovering the creature. 

- EMH, TT, ML, and DH all contain some sort of video and/or audio distortion, indicating that The Slenderman has an effect on modern digital instruments. This does not appear in any of the original accounts, but these also mainly make use of photographs and lower-tech video. EMH has suggested that this distortion is the effect of Sigma Radiation, radiation said to be given off by Slenderman and the Rake. Sigma Radiation is also contagious, as it entered Evan's blood-stream when his arm was brutally maimed by The Rake. 

- EMH and ML also describe the phenomenon known as "Slender Walking." Slender Walking is a term created to describe Slenderman's apparent teleportation and space-time warping/teleportation between locations. These abilities were seen in early Slenderman accounts and are one of the most recognizable elements of the mythos. Slenderman's ability to appear – seemingly from nowhere – in a place where he wasn't mere seconds before is one of his most terrifying traits and EMH mentions the effect of this on a person's mental health.

- Certain contemporary views see his movement as either extremely limited or impaired as if he is incapable of moving his body properly. It is rarely seen to actually move and goes from standing still to rapidly teleporting within the blink of an eye. There is no apparent coherency to his movements or position, and he is capable of teleporting several dozen times to various locations in a few seconds. He does not flee and can be just as dangerous standing still as when obviously teleporting. He is capable of – and often will – stay within several dozen feet of his target, no matter how they try to escape. It seems to be part of his psychological attack to stay just within visual range without actually attacking – the fact that he is there, no matter what, is often described as worse than actually being attacked, the psychological effects often deteriorating the mind of the victim as a result.

- He appears to be able to follow any and all targets regardless of where they go, or where and how they hide. It isn't certain how he does this, but he seems able to keep a perfect trace on its targets, often speculated to be a part of his supposed existence as a potentially omnipresent being.

Facts: 

- As of now, there have been no ways as to defeating or getting rid of Slenderman in the canon so far.

- On June 8th, 2009, a "paranormal pictures" photoshop contest was launched on the Something Awful (SA) Forums.[1] The contest required participants to turn ordinary photographs into creepy-looking images through digital manipulation and then pass them on as authentic photographs on a number of paranormal forums. Something Awful users soon began sharing their faux-paranormal creations with layered images of ghosts and other anomalies, usually accompanied by a fabricated witness account to make them more convincing. On June 10th, SA user Victor Surge (real name Eric Knudsen) posted two black and white photographs of unnamed children with a short description of "Slenderman" as a mysterious creature who stalked children. On June 11th, 2009, Victor Surge continued to improve upon the myth by adding another picture and a fake doctor's account

- Slenderman has received a live-action film of him that was released on August 10th, 2018. Being portrayed by actor Javier Botet, written by Victor Surge, and produced by Screen Gems.

- In 2014, two 12-year-old girls were "influenced" by Slenderman into stabbing their friend 19 times in order to "please" him and put the blame on the character, the girl survived and the attackers were apprehended.

- Slenderman is immortal, he cannot be killed through any means and there is presumably no way to get him to leave you alone, no exorcism can get him to leave, and even if he does decide to leave he can still get his proxies to carry out his work. Without a doubt, he is one of the most dangerous Creepypasta characters of all time.