While it has been known that Calise was just another identity for Kasyrra, what is revealed is that Kas didn't make up an identity, she stole and identity. The Demon Knight fought earlier is the original Calise who was basically on her way towards stopping the demon invasion in its tracks before the PC even woke up, before Kas put a stop to that and turned her into a demon, ironically doing the same thing that was done to her. Tollus had already legged it to the coastline and is in the end stages of his plan; however, by this point most of his power base has been broken.