Well, technically speaking, Korrin is an apostate. Just not one of those, fortunately for him. She backs up toward him, assuming a protective stance while setting firing at them with her staff.

"Yes. I'd be tempted to say something sarcastic, but I'm a little busy here. Let's just pretend I did, hm?" She flashes a smile while glancing back, then glares at the nearest apostate. "You really don't give up, do you? Fine, be stupid." With that, she casts Winter's Grasp and freezes the poor apostate in place for a moment.