Yeah, no kidding, this isn't Athena's favorite way to spend her time, either.

She doesn't really get what the gestures are supposed to mean until the girl starts punching the mirror, and she blurts, "You want me to break it?" without remembering that she won't be able to hear her. Sighing, she starts to try and make her incredulity known through gestures, because she's not really keen on touching the mirrors again. Even with her sword.