Xon Trillus was a male Human living on the Eternal Empire capital of Zakuul. He was a member of the Heralds of Zildrog, a cult worshipping the mythical serpent-god Zildrog that controlled the Old World of Zakuul. In 3632 BBY he was among the Heralds present at the Razor, when it was attacked by the Outlander wanted for the assassination of Emperor Valkorion. Xon engaged the Outlander and their companion, but was killed during the fight.