Board Thread:Speculation House/@comment-11188061-20131025065122

Weiss Schnee was the easiest of them all: A mirror. An object that reflects everything before it, but could never reflect itself. This ties in with being Miss Perfect, an ideal person in her mind who could do everything (A mirror that can reflect anything).

Therefore, by channeling Dusts into her glyphs Weiss is able to produce many types of attack. In the future, when she has finally made peace and resolution with herself, I believe her Semblance would evolve to the point where she could outright mimick any Semblance or attacks (without the previous limitation of needing to channeling the power through her glyphs, which in many cases should've made the mimicking impossible), and even focus and enhance the Semblance attacks of her the others.

The others are kinda hard to guess. So I'm leaving the discussion of other characters to you guys. 