Pethros Vos was a male Kiffu Guardian. He was married to Quian Vos with whom he had a son, Quinlan. Pethros and Quian were given as a sacrifice to the Anzati by Tinté Vos, in exchange for the Anzati feeding on the Kiffex prisoners.
Pethros was remembered by his son, Quinlan, throughout his life. Quinlans's son, Korto Vos, carried on the Vos family.