As in Greek mythology, she is the goddess of wisdom and heroic endeavor, and daughter of Zeus. In Kurumada's mythos, she is sent to Earth by the Olympian gods every 250 years, when evil takes over Earth. Her mission during every one of her incarnations is to restore peace and bring hope, destroy the agent of evil and protect Earth. To do so, she has been assisted since the age of myth by an army of 88 youths of great strength and courage, whose fists rend the skies and whose kicks split the earth, who don radiant holy armor called Cloths, and who are known as the Saints of Athena.
Source from Wikipeida