Is there a demon similar to slender man?

Answer 1

There are no specific demons that are similar to Slenderman, though Slenderman has many ties to other tales and folklore. Slenderman has many similarities to the likes of child stealing Fairy Tales, as well as more modern myths, like The Gentlemen and the Kinderstodt from Buffy the Vampire Slayer and Jack Skellington from Nightmare before Christmas, for just three examples.

From the realms of conspiracy theories, the Men in Black are also a good example of a Slenderman analogy, the faceless suits that come in and make you disappear without a trace.

Hope that helps.