"So much for for old friends. And you, Zoe. It's been a long time. How is my little traitor? I will enjoy killing you." - Atlas when Percy and his friends confront him
Atlas (Also called "The General" ) is the Titan of Endurance and Strength. As punishment for leading the armies of Kronos against him in the First Titanomachy, Zeus charged him to hold the sky for all eternity. He is Kronos' second-in-command, and is in charge of recruiting monsters for the Titans' cause. Atlas is the main antagonist in The Titan's Curse, the third book in the Percy Jackson series.
Luke also serves him in the whole book. Atlas is Zoe Nightshade's father and he kidnaps Artemis so she can hold up the sky in his place. He also holds Annabeth prisoner and sends skeletal warriors and a monstrous lion after Percy and his buddies, but they manage to escape. Percy and his friends arrive at Mount Orthrys where they discover Annabeth and Artemis chained up. There is a huge fight, in which Atlas succeeds in killing Zoe, but Percy lifts up the sky and knocks Atlas underneath it, pinning him to the rocky ground.