User blog comment:Zathronas/Speculative author: Where are the Grimm?/@comment-19933501-20140914035340/@comment-24218038-20140914121303

@ Maki I am willing to bet that there will be at least a species of grimm called the Reaper.

@Shadow Fair enough, then how would you legitimize them?

@Varzan Sorry, I just don't see them working together unless they are of the same species. The Nevermore and the Deathstalker are just there at the same time. We never see them doing anything that resemble a coordinated attack.