The younger brother of Zanoba and was Roxy's student before she quit her position as Shirone's Court Magician.
He later becomes king of Shirone after subjugating and killing those related to the throne.
In the original timeline where Rudeus does not exist, after becoming king, Pax created a republic where it would become one of the leading powers to fight against Laplace's resurrection. However in the current timeline, he committed suicide before the Shirone Republic came to fruition.