User blog comment:Omega natsu2/Fairy Tail Episode 197: Hisui Rises, Review./@comment-4933386-20141108065242/@comment-7418318-20141108084849

There is something else I wonder about Hisui. Yukino and Lucy only found out that something was wrong with the Zodiacs when they couldn't summon them. And they only learned about the rebellion when those Spirits attacked them.

Hisui has no golden keys and wasn't attacked by them. It's unlikely enough that Hisui deduced that something was wrong with the Zodiacs, but guessing that they needed sealing away, having the means to do so and accomplishing it so quickly that they keys are finished already?

Or did she alreay have those keys prepared in case something went wrong during the Eclipse Project and just brought them out now? That would actually make more sense come to think about it.