Speaking of which, there could be also a special interaction between Nianxi/Xiandra and Lilith. While the personality shift is very inconsistent, the Xiandra personality is sensed as a demon (by other demons anyway), and Nianxi as human. Obviously, Lilith could be extremely confused, as they don't exist at the same time, they just.... switch, unlike her case. Also, Xiandra, would taunt Lilith to no end, as she's kinda the evil dominatrix kind to other demons. And tormenting a trapped demon lord would be quite priceless to her. Nianxi, however, would want to kill Lilith. Neither one would care what happens to Susanna though.