Fergus var Emreis is one of the former Emperors of Nilfgaard. He is succeeded by his son, Emhyr var Emreis. He signed a treaty of neutrality with the Koviri king Esteril Thyssen. He also introduced equality into the military Nilfgaard. His reign was ended when he was overthrown and murdered by a Usurper in 1233, when Emhyr was only 13 years old. His son would return and claim his destiny eventually.