Talk:Ken Kaneki/@comment-190.189.34.241-20150605104540/@comment-25047329-20150605145644

In real life folklore there isn't a whole lot known about ghouls. They're generally considerd undead beings who feast on human corpses and that's pretty much the gist of it. Due to the simplicity of the concept, there are no strick "rules" regarding ghouls, so in fiction, ghouls are whatever and however the writer wants them to be. The concept is so vague that the word "ghoul" is sometimes used interchangeably with "monster".

So in broad terms...yeah, you can refer to the Slender Man as "ghoul", If only because it's such a vague term that it can be used to describe any horrible monster.