Hmm, I don't think those are fairy maids, too big and they are talking about "thralls" so I'd suspect the maids might be those here. This is the past after all and fairies would match the intention of "hiring someone more cheerful" I'd say.

So Patchouli straight-up murders a group of a dozen or so young women, and nobody bats an eye? (Pun not intended, but still there.)