He trusts her to stay mostly out of trouble. Brigid is good at taking care of herself, within a framework of authority - and it's something he's used to.

"Two other archangels and two lessor angels. Only one older than I am." He doesn't say which - most would never remember that Lucifer, fallen or not, was still an angel without prompting, and regardless, he was still Raphael's brother and Raphael still loved him.

"There are several. They cannot cross lines of iron, salt and holy water will ward them off. You shouldn't need more than that." And if she did, he'd handle it.