User blog comment:Forrestib/Something new about the Black Trailer/@comment-2006510-20140717061647

As far as Ruby being 'slow' in the trailer, my theory is she simply didn't use her Semblance for whatever reason

Except for when she simply 'vanishes' - that right there had the same appear/disappear roses motif, almost exactly like in Episode 6, when she appeared in front of Weiss's attack.