The Gorilla King, or Silverback King, is the title of the feral monarch of the city of Usaro in the Mwangi Expanse. It is believed that since the founding of the city many centuries ago the King has always been a gorilla, magically awakened into sentience to become the most honoured of Angazhan's servants in Golarion. In fact, the truth is even more sinister. The current holder of the title is a previously-human dire ape called Ruthazek.