Aurelion Sol once graced the vast emptiness of the celestial realm with wonders of his own devising, but was tricked by the Aspects of Targon into revealing the secrets of a sun that he himself created. His awesome power was channeled into immortal god-warriors to protect the apparently insignificant world of Runeterra—now, desiring a return to his mastery of the cosmos, Aurelion Sol will drag the very stars from the sky, if he must, in order to regain his freedom.

Aurelion Sol is a Celestial, an entity coming directly from the Celestial Realm. As a Celestial, Aurelion Sol does not possess a proper body and instead chooses to take the form of a dragon.