User blog comment:The Bespectacled Guy/MCM London ComicCon 2014/@comment-11188061-20141026045911

Can you help me ask a question? I want to know if a Grimm's skull will evaporate as well when a Grimm is dead.

We know for sure that it's black body will, but seeing the new mysterious woman, I seriously doubt that her mask is a fake (as of Adam's).