Board Thread:Speculation House/@comment-71.17.68.254-20130907025506/@comment-3146930-20140303183658

I don't think the Nevermore and the Death Stalker were intentionally helping each other. If you watch, the Nevermore seems to mostly focus on Weiss or Ruby as they climbed in its back through unknown means. The Death Stalker on the other hand mostly focused on Jaune and Pyrrha. If you watch, the only time the two Grimm seem to show real teamwork is when Ruby goes after the Death Stalker and the Nevermore tried to attack Ruby, showing unintentional teamwork.

As far as a hive-mind goes, I think Grimm are all created by one immensely powerful Grimm that is dormant. This being was defeated during the Human-Grimm War and despite it being asleep, it still fills Grimm with a desire to hate humans. However, aside from that I think that Grimm act relatively independently from each other.

As far as the Smoke and Dust idea, I don't agree or disagree. I mean we haven't seen a Grimm completely dissolve in front of us and Nora/Peter Port either talk about selling Grimm fur or have a Grimm head on the wall; so they don't completely vanish when killed. However if they are made from some kind of Anti-Dust, when they are killed it is possible that a part of their power can be transferred to other Grimm as I suggested (symbolized by the smoke).