Brilliant sorcerer, scientist, and hideous beaked brain-beast.
Murthwaite was formerly the composed and very proper head scientist stationed at the prison-fortress The Kyte. He was revealed to have been conducting hideous experiments on the prisoners, dissecting them and using their parts to create Foulspawn abberations, and maybe worse.
He was allowed to escape with his life and his research in exchange for his unused skyship and opening the way to Jorok Stone. Whether or not he escaped the destruction of the City of Chains is unknown.