Talk:Doppel/@comment-28369736-20160531093945/@comment-26953951-20160531113147

From the trivia section:

Doppel's true eldritch nature, as well as it being described as a "faceless existence" and a "creeping chaos", heavily references the Cthulhu Mythos deity Nyarlathotep, who is known as both the "Faceless God" and the "Crawling Chaos".

So Lovecraftian mythos definitely.

As for the second part, there is no 'Monmusu-verse'. Quest and Encyclopedia should not be considered canon to this series, their worlds are just way too different.