The Slender Man is an alleged paranormal figure purported to have been in existence for centuries, covering a large geographic area. Believers in the Slender Man tie his appearances in with many other legends around the world, including; Fear Dubh (or, The Dark Man) in Scotland, the Dutch Takkenmann (Branch Man), and the German legend of Der Großmann or Der Grosse Mann (the Tall Man).
The Slender Man is a being male in appearance who looks like a man with extremely long, slender arms and legs. He also appears to have 4 to 8 long, black tentacles that protrude from his back, though different photographs and enthusiasts disagree on this fact, and therefore it is theorized he can ‘contract’ these tentacles at will.
He is described as wearing a black suit strikingly similar to the visage of the notorious Men In Black, and as the name suggests, appears very thin and able to stretch his limbs and torso to inhuman lengths in order to induce fear and ensnare his prey. Once his arms are outstretched, his victims are put into something of a hypnotized state, where they are utterly helpless to stop themselves from walking into them.
He is also able to create tendrils from his fingers and back that he uses to walk on in a similar fashion to Doctor Octopus. The superhuman stretching ability could also be seen as a similarity between himself and Mr. Fantastic.
Whether he absorbs, kills, or merely takes his victims to an undisclosed location or dimension is also unknown as there are never any bodies or evidence left behind in his wake to deduce a definite conclusion.
His face is pale and slightly ghostly, and almost appears to have been wrapped in a type of gauze or cloth. his facial features are also an object of debate, and many people believe that his face looks different to each person, if it is seen at all.
He sometimes is portrayed wears a hat, which is sometimes a bowler, a fedora, or sometimes a tophat. He may also be seen wearing a long flowing necktie or scarf, which is either red or grey.
He often keeps his long, pale hands crossed politely behind his back or hanging loosely at his sides. His suit is black, sometimes portrayed as pinstripe in artwork, a common misconception thanks to the very similar Jack Skellington from Nightmare Before Christmas. He has long coattails which he lets flow proudly. He wears long dress shoes, which are always shined a perfect, gleaming black.
Much of the fascination with Slender Man is rooted in the overall aura of mystery that he is wrapped in. Despite the fact that it is rumored he kills children almost exclusively, it is difficult to say whether or not his only objective is slaughter.
Often times it is either reported or recorded that he can be found in sections of woods, and these generally tend to be suburban. He also has been reported seen with large groups of children, as many photographs portray. It is commonly thought that he resides in woods and forests and preys on children. He seems unconcerned with being exposed in the daylight or captured in photos.
It is often thought as well that he enjoys stalking people who become overly paranoid about his existence, purposefully giving them glimpses of himself in order to further frighten them. For this reason, it seems like Slenderman very much enjoys psychologically torturing his victims.
He also often appears to float or drift around rather than walk, which suggest the possibility of him being an ethereal being rather than a creature or a man. This would also explain why he is able to remain mobile in spite of his poorly proportioned body.