Ahh, Dresden Files. Great books.

And it's a bit of a stretch, but I suppose it's entirely possible. After all, things are rarely set in stone. A moment of weakness could be repaired. So aye, I say go for it. Be forewarned, though. The Pure Angels would give your character even more ridicule than they give to the normal Risen. After all, how could they be trusted~? So go for it. ^^