Kronos
Kronos (Κρόνος in Ancient Greek, also known as Cronus, meaning "time") is the King of the Titans and the most powerful child of Gaea and Ouranos. Kronos is the main antagonist in Percy Jackson and the Olympians, being directly responsible for some of the major events in the series. Kronos is the Titan Lord of Fate, Harvest, Justice, and Time whose Roman counterpart is Saturn.