Board Thread:Speculation House/@comment-173.79.212.97-20130901230148/@comment-16502426-20130930061823

The only issue is that in the second shot, you can follow the snake from head to black part... and it doesn't include the white part coiled right below the head. So that black part seems to be a "stripe" or sort of patch that goes back to the original color after. You can also see a stripe flash past at the part where Ren is sliding along them before he loses his weapons.

Now, that isn't to say that they aren't connected further along. In fact, I personally think that they are connected. If two of the same type of Grimm are different, then Pyrrha's comment about anonymity makes very little sense. However, if every instance of this kind of Grimm is half-black/half-white, then it at least makes a little sense.