I confess that I thought Cassandra's character was a spy for another faction, for Gudinna herself or for one of the Karlsson sisters.
I thought that if Olivia humiliated her, Cass would stab her in her sleep, and that if she treated her decently, she would end up being her ally.
In the end, Olivia's character was almost the main character and Cass was less than a supporting character

.
But I'm sure a lot of us had crazy ideas about the first three chapters, where new characters kept appearing and we didn't know who was going to be more important.