Board Thread:Speculation House/@comment-14138255-20151206164217/@comment-10390252-20151207115522

The key, and Mercury noticed this, is that you can't always be sure exactly when Pyrrha does and us or is not not using her Semblance in a fight. That adds a wildcard to fighting her: It's not always possible, in advance, to know which of her moves are Semblance-dependent, unlike most other Huntsmen and Huntresses who tend to broadcast it in a big way.