Board Thread:Speculation House/@comment-108.180.145.133-20130922140854/@comment-16774229-20130922152745

We still have a lot to learn about Grimm, so there's not much we can say about it. But given that they bleed smoke (and in some cases rose petals), I don't think they do a lot of things naturally. I think that after they fully evaporate or whatever, the smoke floats around until it can condense into a new Grimm. Sort of like monsters in Percy Jackson.