Board Thread:General Discussion/@comment-121.217.139.187-20130906125055/@comment-12744597-20130907215916

The black glyph that Weiss used probably is a 'gravity' type effect, much like how all the 'demi' spells from the Final Fantasy games are represented with black spheres. The pull of the black glyph would then hold Ruby in place until the two of them were ready to lauch her at the Nevermore.

The red glyph is probably similar to when she blocked using a red-enhanced sword during the White trailer. She simply held her Myrtenaster overhead as the armor brought its sword down towards her, but it was then repelled violently as Myrtenaster flashed red. It could either represent explosive force, or perhaps some type of barrier ability (reflecting more of the force of Crescent Rose firing to help propel Ruby farther/faster).

Hopefully we'll get more information on Weiss' black and red glyphs in a future episode.