Board Thread:Roleplaying/@comment-1734134-20190906112145/@comment-17114085-20191117103151

Red's whole issue seems to be that he doesn't think the PDF are acting within reason. Siros' reaction to the news is odd in two ways:

Now this does seem like Metagaming imo. Siros is acting on knowledge that he should not have. As far as he knows the Scions are on the same side as the Astartes. Other than 1 argument, for which he wasn't present, the Scions and Astartes have been helping one another.
 * He automatically assumes that the Commissar/Scions and the Astartes are at odds without any knowledge on either parties identities or plans.

Now the fact that he immediately jumps to the conclusion that the Commissar is his enemy isn't a problem since under his command this cell of PDF have been in clear violation of the Primer and he should expect the Commissar to dish out disciplinary action for this. The problem imo is that he assumes that the conflict isn't between him and the Commissar, but the Commissar and Cyradon. He was not present for Cyradon's outburst in the cave so he should not know that Cyradon is at odds with the Scions. I don't have a problem with this as much as Red since I assume that Siros' reaction is one of a fearful man trying to act tough. He knows what his forces have been doing are enough for a Commissar to dish out disciplinary action, so he knows that his head is on the chopping block for allowing this to happen. Now he could either roll over and let the Commissar walk all over him, or he could lash out and try to get the Commissar first. It seems obvious that he is going with the latter option since he says he's going to disarm and arrest them. He has more soldiers than the Commissar so he might think that he can beat them with superior numbers. That is how I understand it at least.
 * He treats the arrival of the Commissar extremely nonchalantly.