He was the son of the Titans Hyperion and Theia, and therefore the brother of Selene (the Moon) and Eos (the Dawn). When the great war broke out, they sided with Zeus; Zeus emerged victorious, and instead of being imprisoned in Tartarus, they were rewarded by being granted their own domains. Helios became the personification of the Sun and took on the task of carrying the Sun across the sky. During the Gigantomachy, Helios fought against the Giants, and when Hephaestus was wounded, he carried him away in his solar chariot.