I love the dialogue between Nicholas and Cassangelique. They both appear to be Satan's minions, but Nick is either ranked higher or has pleased the Master more than Ang has. Watching the two of them bicker is a joy. I get the impression that they are in competition with each other, and Angelique's mission is to reinstate Barnabas' vampire curse while Nicholas, while mission-less right now, will also be searching for a way to please the Master MORE than Angelique will.
In a way, they are like brother and sister, but I have a feeling that, when they were in the coven together, they were intimate and equally competitive.
Love, Robin