User blog comment:VedranTheII/Pretentious Diaries 2: What tricks would you teach your Aura?/@comment-4010415-20150720024504

Uhh... The barrier that Weiss made in No Brakes, during her fight against WF Lt, was most likely not Aura. It was actually likely Dust, considering she used Myrtenaster to draw it.

Also, when the WF Lt struck it, it had the same exact appearance as when Yang struck Neo's barrier in Painting the Town. Neo's umbrella has a hole in the top of the shaft, possibly to expel Dust from. Also note that Weiss kept the barrier going by pointing Myrtenaster at it.