The Watcher of the Mists
Sakarja is a standard erinyes devil.
Sakarja was captured millennia ago from the Ethereal Plane by the crew of the aether ship Emperor Xin, during the height of the Thassilonian Empire. Held in stasis aboard the ship, she found herself transported to what she described as a “torture chamber” where her vast amount of life energy was tapped to power the ship.
She was freed by the Sandpoint Heroes when the Emperor Xin materialized in Magnimar Harbor on 19 Neth 4707. In gratitude, she presented the party with a means of summoning her to serve for 24 hours.