Leonidas "Leo" Valdez is a Greek demigod, the son of Hephaestus and Esperanza Valdez. He is one of the seven heroes of the Prophecy of Seven. After sacrificing himself and being resurrected using the Physician's Cure, he rescued Calypso out of Ogygia. He is currently living with Josephine and Hemithea, while going to high school with his girlfriend Calypso.