Grintharke

Grintharke was a Balor (A type VI demon (first and second edition) who ruled over Hellgate Keep. He and his followers were exiles from the Abyss and if destroyed in the Prime Material would slowly reform, only to be exiled once again. Due to this they were unable to gate in demons more powerful than manes (which transformed into shadows and mane's), and for this the forces of Hellgate had few actual demons in their forces. Grintharke constantly sought to apease his masters in one form or another in the hopes of regaining a standing in the Abyss.

Grinthae was once a ruler of a city at the base of a volcano on another world, and brought a number of magically altered pterosaurs with him.