Board Thread:Speculation House/@comment-25411051-20140918033238/@comment-4010415-20140919120430

There is at least slightly a reason for her to not realize it's the same woman from the airship in the first episode, in my opinion.

The way she blocked the bullets was by using aura shields, much like what Ren used to stop the King Taijitu's fangs. Therefore, blocking the bullets can be waved away as this infiltrator having trained more in aura than hunters usually do. (I'm assuming most hunters don't delve deep enough into training with their aura to do the things Ren and Cinder did)

The glowing on her clothes was from dust, and while infusing dust into clothes is considered somewhat archaic and is, apparently, probably less common than simply using dust bullets, it can be waved away as another case of someone who infuses dust with their clothes.

However... This time, Cinder did not rely on only using dust.

Instead, she used dual swords that come together into a bow, and she threw ice crystals at Ruby. She used a different fighting style than the fire casting from the first episode. This is what would, and probably will, throw Ruby off.