Hydron was the crown prince of Vestal, leader of New Vestroia and commander of the Vexos. He was King Zenoheld's only son. But he and his father don't seem to have a bond. He was then the new leading Subterra brawler for the Vexos, replacing Gus after Gus and Spectra left the Vexos. It is revealed in "Facing Ace" that he possessed the petrified statues of five of the Six Soldiers that saved Vestroia: Runo's Tigrerra, Julie's Gorem, Marucho's Preyas (not Angelo/Diablo Preyas), Shun's Skyress, and Alice's Hydranoid. His goal was to "complete his collection" by getting his hands on Dan's Drago.