She can't say she's surprised by his flight and simply raises an eyebrow at Sorin's dash, following him sedately across the arena, gun still at the ready. She doesn't need a weapon to kill him, not really. Once she corners him, this body has the strength to rip out his throat.

But he's a vampire, and there's something so terribly fulfilling in hunting him down. She has the Time Lords to thank for that. All Rassilon's fears and anger toward the vampires has been bred into her and it comes to full bear as she hunts this one down.