User blog comment:Zathronas/Analysis by an author: World of Remnant, Grimm/@comment-10390252-20141017104932/@comment-11188061-20141017231834

Well, for your 2nd point on who comes first, that's your interpretation that Grimm comes later. Twice it has been stated that 'Grimm has always been there as far as mankind can remember'. The obvious and logical assumption is that Grimm is on Remnant before mankind emerged. Humanity's first natural enemy in Remnant is Grimm.