Well, test game implies if you have an awake Lady of Love as Pan, that she will reduce unrest by 10 each turn. 200 unrest was giving me 19-20 per turn, so I'm guessing she could support 140-150% safely, which is pretty neat. Of course, just being awake is a bit of a design point sink, and you're not getting an SC out of it, just more gold. I'm sure that can be leveraged nicely if part of a larger strategy though.
But Caelum, at least in EA, doesn't get Lady of Love. I tried Lady of Fortune, who did jack and nothing.
However, both got the same 19-20 unrest per turn that Sauromatia did with some random shmoo for their pretender.
Is there anything I am missing?