Ettins: Should be repond, do not appear to be.
Fan Dancers: Should be demon, do not appear to be.
Succubi: See above. Someone told me they just have high physical resist, and while consecrate weapon did up the damage somewhat, it still wasn't what you'd expect.
Not sure this counts as a "bug" so I'm putting it here. Quick search didn't show anything, so I figured I'd at least make note of this phenomenon's existence.