primary human antagonist. He is a demigod son of Hermes who turns against the Olympian gods to serve the Titan king Kronos, ultimately acting as Kronos's physical host before sacrificing himself to save Olympus.


complex, charismatic, and tragic character. He transitions from a supportive, big-brother figure and skilled swordsman at Camp Half-Blood into a bitter, vengeful antagonist driven by deep-seated resentment toward the Olympian gods, ultimately redeeming himself as a tragic hero.
Smooth and persuasive at first, then tightens into razor-edged certainty; occasionally speaks like he’s delivering a verdict.