Loken definitely is not expecting Aura, since she has no visible energy field surrounding her, nor does the slight tingly feeling or smell of ozone that comes with a refractor field or an Iron Halo appear around her. He assumes she is agile enough to deflect the flat swipe of his blade that he uses during her spring, and is momentarily shocked when the weapon bounces off her Aura, leaving him flatfooted and open for a swing, if only for a moment.