The Slender Man (also known as Slenderman) is a supernatural creature with nebulously defined characteristics and abilities. Slender Man was first mentioned in Something Awful Forum's "Create Paranormal Images". He generally appears (in modern times) as a tall humanoid creature in a black or grey suit, red or black tie, and white shirt. His face is totally white, completely devoid of facial features. He has no hair, and generally has normal-looking bare hands, albeit with fingers longer and bonier than a typical human. Slender Man has been depicted in imagery and literature at anywhere between 6 and 15 feet tall, depending on the situation, though in video he is usually only around 6-7 feet tall. Because of his inexact nature, and differences between accounts, no one has yet determined what, exactly, the Slender Man is. Currently, there are two leading theories as to what the Slender Man may be: the Tulpa Effect and Quantum Theory.
The internet popularity of Slender Man has spawned a massive number of interconnected ARGs, collectively known as the Slender Man Mythos.
Name: Slender Man, The Tall Man, The Thin Man, Der Schlanker Mann, Fear Dubh, Schlankwald, Slendy, Slenderman, The Pale One, The White King, Master, Black King
Origin: Creepypasta
Gender: Inapplicable, called a male
Age: Unknown, likely as old as the universe
Classification: Monster, giant man, eldritch horror, immortal god
Attack Potency:Varies from Wall level (Even the weakest avatars can rip trees out of their roots), Large Planet level (Has been implied to have caused the rotation of the Earth, which has been calculated here) and Macrocosmic level+ (Slender is said to be a being who watches over us as if he is the author) | Macroverse level+ (Exists across the multiverse, which has been said to be infinite)
Superhuman Physical Characteristics, Teleportation, BFR, Reality Warping, Plot Manipulation (Vince is convinced that he and the others are fiction and their entire lives have been fabricated and controlled by HABIT and the Administrator), Spatial Manipulation, Technopathy (His presence distorts audio and video recordings. Caused a plane's electronics to distort and briefly go out of control), Memory Manipulation (Erased Noah's memories after appearing to him on a plane), Mind Manipulation (Can manipulate the minds of others to completely control them, turning them into "proxies". The members of the Collective have been mentally dominated by the Administrator and lost their free will), Madness Manipulation (Type 3), Sleep Manipulation (Caused several characters to pass out or suffer blackouts throughout the series and caused Jessica to suffer insomnia), Dream Manipulation (Jessica has a recurring dream of her being a child and being observed by the Operator), Aura (If desired, the Operator's presence causes bystanders to become nauseous, cough up blood and experience seizures or blackouts), Possession (Possessed Dan Wittlocke and made him smother his daughter to death), Darkness Manipulation (The house Jay explored in Entry #23 became darker as he progressed to it, even though it was daylight and when revisiting previous areas that were lit by natural lighting. Shrouds the Dark World into constant darkness), Invisibility (Rendered himself in a state of invisibility in the movie where he could only be seen by cameras), Telekinesis (Sucked Jay towards him in Entry #52 and moved a few sheets in Entry #11. Used frequently throughout the movie), Elasticity (Can stretch its arms), Light Manipulation (Generated unusually bright light at several moments in the series), Supernatural Tracking (Seems to always know exactly where to find its victims), Biological Manipulation (Able to brand victims with an Operator Symbol that can cause emotional insanity to certain people who see it), Necromancy (Reanimated Milo's corpse in the movie), Electricity Manipulation, Nigh-Omniscience, Clairvoyance (When someone knows about him, he knows about them), Illusion Creation, Darkness Manipulation, Perception Manipulation (Vision, Hearing, and Sensation Manipulation), Causes Coughing, Vomiting and Nausea, Dream Manipulation, Sound Manipulation, Status Effect Inducement, Absorption (Seemed to absorb Hallie into it), Invisibility, Intangibility, Possession, gets stronger the more people know about it, Shapeshifting (Able to turn himself into a giant spider), Radiation Manipulation (Emits Sigma Radiation, which induces violent sickness and intense, bloody coughing fits on anyone exposed to it, quickly resulting in death), Illusion Creation and Perception Manipulation (Made Stan hallucinate the presence of several children in 27.Film Student), Transmutation and Power Nullification (Turned the god Connor Lines into a human and removed his abilities in the Stan Frederick series), Pain Manipulation (Able to dull the sense of pain), possibly Weather Manipulation (It is implied that the Administrator can enable rain as signal of his presence), Immortality (Types 1, 3, 6, 8 and 9. The Operator "infects" those that interact with it and spreads to those that these Sources interact with, guaranteeing him immortality for as long as they exist. The only way to render the Operator mortal is by killing or curing all of the Sources. His true form exists outside the material universe), Time Manipulation (Able to distort and loop time. Seems to have put the Jack into a time loop), Regeneration (Mid-Godly; as long as at least one remembers him, he will return into existence)