Andarsella

A Greater Sphinx the party met in Episode 18, who seems to be some sort of leadership in The Claws Of Bastus. 
Andarsella watched as the party dueled her mate Tython and intervened when Vahlka attempted to kill the lesser sphinx. Vahlka has sworn that someday she will kill Andarsella, she has not elaborated why to the party but it can be presumed that the Sphinx caused her some sort of personal grievance when Vahlka was stationed in the Vastlands.
Her and The Black Cat seem to have a close relationship.