Zeus

is the great god and chief god of the Olympus. His current location is unknown, throughout the series has only had only mentions. He along with Hades, son of Kronos and Rhea, in the age of myth had three children with Europa.

Trivia

 * His title in japanese (天帝) itself also means "Shàngdì" or "God".
 * Probably based on Polaris or the North Star (天帝星).