A Runner is the name given to any human being who is “running” from The Slender Man , or in some cases, Optic Nerve. Runners can be of any age, any backround, and any culture, as The Slender Man is totally indiscriminate in whom it kills .
Many runners will band together and/or help eachother in order to increase their chances of survival. Runner groups tend to be more resiliant, however they are also easier to find.
The only thing that differentiates a runner from a typical victim of Slender Man is the fact that they have, at the very least, succesfully avoided Slender Man at least once.