[Now that he thinks of it, he's unclear on the how and why of Earth-α's destruction. That'd be good information to have, but... he really wants more details on Power Girl, first.]

Ah. [sympathetic-] I'm sorry. That can't have been easy on anyone.

Power Girl was around for that, too, though, wasn't she? If even she couldn't stop it...

[A) it must have been incredibly serious, B) or maybe she was de-powered or otherwise incapacitated, which is also serious, and C) it doubly can't have been easy on her. Imagine, hearing all the screams of a dying world, unable to save them... that's the kind of thing that scars people for life, human or no.]