List of Percy Jackson and the Olympians characters
Krios: Krios is mentioned to be Lord of the South and the Constellations and is only mentioned in one of Percy's dreams, where he is forced to babysit Atlas. He is dissatisfied with his condition because he only wears ram horns, but Hyperion can blow up into flame. He is also mentioned fleeing when Kronos was defeated. He wears armor that has glowing stars on it. Jason Grace is said to have defeated Krios during the Roman invasion and assault of Mount Othrys, which happened at the same time as the Defence of Olympus, led by the Greeks.