The Operator (Slenderman) Symbol

The Operator Symbol is a circle with an "X" drawn through it: Ⓧ. It has not been revealed what it represents or what its function is except that it is somehow connected to the Slender Man. It was first depicted within the MarbleHornets series and has since appeared in many other slender series as well. It has appeared in MarbleHornets as well as TribeTwelve
Since it was used in Marble Hornets, its popularity has led it to be synonymous with Slenderman by the general online community.

Speculation
There are a number of theories surrounding the Operator Symbol's meaning and function, however one should still keep in mind it is used in ARG's and not in any actual Slenderman lore, thus utilization of any of these things will net no results in reality.

Meaning

It may represent the Operator's face, because the Operator has no face.
It may represent the Operator's eyes, as seen in MH Entry 50 and in Forecast.

Function

• The symbol summons The Operator to wherever it is drawn.
• The symbol acts as a ward against The Operator to keep him away.
• The symbol acts as a warning sign against The Operator.
• The more the symbol is drawn, the more influence The Operator has in the area or on a person.
• The symbol is perceived to The Operator as a large eye, or observing device and he is drawn to it.
• The Operator symbol can also be a possible portal for The Operator.
• The symbol, wherever it's drawn, means that The Operater is near the area.
• The symbol may have no function in itself but act according to the beliefs of the person viewing it.

Real-world meaning

An encircled "X" can denote a variety of ideas in the real world. For instance, in data modeling, the encircled X denotes the exclusion principle between two populations. In mathematics, the circled X is a mathematics operator meaning "circled times," and describes the tensor product of two vectors. Another version exists as a circle with a superimposed X, and is used to describe the three-dimensional directionality of an arrow.Other versions of this symbol include a circumflex accent, and within a double circle. Non-mathematically, the circled X, or heavy circled satire, denotes the location of a police station on Japanese maps.

However, the circled X has also darker meanings. For instance, the symbol was marked on Ellis Island immigrants to denote insanity. Samuel Clemens, also known as Mark Twain, used the symbol (the escutcheon in his diction) in his notes to represent a skull and crossbones. The encircled 'X" is also similar to Cornelius Agrippa's Planetary Seal of Jupiter, based upon Kamea numerology of the Hebrew alphabet.

No substantial connection has been shown between any of these common encircled X symbols and the Operator symbol associated with Slenderman.

Slenderman

Names: The Slender Man, Him, The Operator, Der Ritter, Der Großmann, Bundle, The Tall Man, The Thin Man, Der Schlanker Mann, Fear Dubh, Schlankwald, Tree Man, Slendy, Slenderman, The Pale One, The White King, Master, Mr. Slender, Black King.

Information: is a creature or being with various nebulously defined characteristics and abilities. Slender Man was first mentioned in Something Awful Forum's "Create Paranormal Images". Slender Man generally appears (in modern times) as a tall man in a black or grey suit, red or black tie, and white shirt, with no eyes, mouth, or clearly defined facial features. It has no hair, and generally has normal-looking bare hands. Slenderman typically is depicted in imagery and literature as between 6 and 15 feet tall, depending on the situation, and in video as around 6-7 feet tall. Because of its inexact nature, and differences between series, no one has yet determined what it is. Currently, the two leading theories as to what the Slenderman may be are the Tulpa Effect and Quantum Theory. The internet popularity of Slenderman has spawned a massive amount of interconnected ARGs, collectively known as the Slenderman Mythos.

Usually only drawings of Slenderman appaerance because Slenderman causes interference with tecnology.

Basic Description:

In almost every description Slenderman's basic attributes will vary greatly, however several basic traits are typical of his behavior. He is shown to behave in a very passive aggressive manner, stalking targets for years at a time, torturing his target mentally for various unknown reasons. He is rarely ever shown in a benevolent light and is typically shown as a malevolent force. This behavioral pattern has an uncertain reasoning behind it, and exactly why he behaves in such a way has yet to be fully ascertained.
The most important factor about Slenderman is the mystery. He lives unlike any human being despite having a similar appearance to one. It is uncertain if he is social, or even understands human languages or behaviors, nor why it is humans appear to be his main target. His targets will typically behave in off ways as if possessed (Proxy), but whether their psychosis is causing them to speak for him or for themselves isn't entirely certain either.

Slenderman's appearance is variable as the years go on, but as of to date the most recent appearance is that of an abnormally tall human with long arms and no face whom is wearing a business suit. Again it is uncertain if his suit is real cloth or some form of skin molded into such an appearance. If it is the former, this would imply an intelligent being attempting to try to blend in. If it is the latter, it shows a being whom is extremely adaptive and evolves to match his environment and stick out less (or more).

Slenderman's appearance provokes a wide range of responses, the most common being fear. This is partially due to his extremely towering size over a full grown adult, which mimics the childhood fear of adult humans bigger than the child. His behavior also factors into it. Finally, the main fact is he is completely unable to be described in human terms. While a description in words can be given, human language lacks the ability to truly define the entity until such a time as when humans can interact with him (if at all possible). This problem stems from the fact that he operates in a plane of existence further from humans. This is believed to be fourth dimensional space which gives him powers a human cannot understand due to humans living in three dimensions of space and being unable to comprehend the fourth dimension at this time.

In total two major types of Slender Man descriptions exist. The original versions depict him as not only malevolent, but extremely dangerous. He will do odd things such as removing organs and placing them in bags, impaling targets on trees, and aggressively stalking targets after a period of time. A contemporary depiction shows Slender Man as being extremely passive aggressive, often letting a person slowly delve into madness at their situation until being unable to cope. If invited to anger, he will typically charge a target down until caught and vanish with them to unknown locations. This version also shows an odd response to electronic equipment and causes massive problems with audio, surveillance, camera, and other various electronic devices with displays or audio. Sometimes an individual can determine if he is near simply by how certain electronics react such as radios, televisions, or cameras. How powerful this effect is seems to vary, and can either be due to Slender Man's own state of aggression, or other outside factors either inside or beyond Slender Man's control.