Gereh is the current steward of King Taravangian. He told the party that he used to be the steward for King Gavliar, but after the death of the king, King Elhokar dismissed him from his position. He then travelled to Kharbranth to work for Taravangian.
Gereh was contracted with by Captain Sebarial to help the party infiltrate and steal a copy of the diagram for the good captain.
Gereh has said that he is not a member of the diagram, but as a steward he’s been privy to many important conversations. Gereh also was able to re-fill Nucko’s strange gold arm band with health, and he’s told the party that Captain Sebarial often hires him and pays him in gold - which indicates that he is likely a Bloodmaker, an individual who can store health in a metalmind.
Gereh is currently in King Taravangian’s palace with Theren and Ravan as they are working through an audience with him.