Aiolos Sagittarius

When Aiolos was 14 years old, he, along with fellow gold saint Gemini Saga, were summoned to Pope Shion's throne room for an audience. There, the Grand Pope revealed that their goddess had once again reincarnated in the form of an infant, and so the Sanctuary must prepare itself for the imminent wars. As Shion himself was getting on in years, he decided that it was time to appoint one of the twelve Gold Saints as the successor to his seat. At the time, most of the Gold Saints were still too young; only Gemini Saga and Sagittarius Aiolos were most qualified. The Pope eventually selected Aiolos as the new Pope, and asked Saga to serve as an assistant to the Sagittarius Saint.

Saga, possessed by his evil side, became jealous at the fact that he was not chosen for the seat, especially since he believed that he was superior to Aiolos in terms of power and wisdom. Saga confronted Shion regarding his decision and killed him. He disguised himself with the Grand Pope's garments, and left to kill the infant Athena. Inches before Saga could dig the golden dagger into the baby's belly, Aiolos appeared and halted the blade from striking the death blow. The Sagittarius berated the man he assumed to be the Pope, but was quickly shoved aside. After a minute of struggle, Aiolos sent Saga flying into the nearest wall, knocking off his headdress and mask. Upon seeing Saga's face and realizing that Saga had killed the Grand Pope, Aiolos immediately snatched away the infant Athena and ran off from Sanctuary.

Saga, disguised as the Pope once more, sounded the alarm and sent guards to go after the saint. It is at this point that he officially branded Aioros as a "traitor." He was eventually found by Capricorn Shura and managed to flee, but was deadly injured.

As he was dying, he ran into Mitsumasa Kido, who was touring Greece at the time. Aioros begged the elder Kido to become Athena's new guardian, and explained to him the travesty that had taken place at the Sanctuary. Along with other secrets, Kido learned about the existence of Athena's Saints and their Cloths. Entrusting the elder Kido with Athena and his own Sagittarius Gold Cloth, Aioros succumbed to his injuries. It is unknown as to where exactly Aioros died and buried, as the whereabouts of the location is omitted in the series.

After his death, Aioros' spirit would provide assistance for Athena and her Saints. He has aided Seiya in battles by lending the young bronze saint the Sagittarius Gold Cloth time and time again, and even appeared once to his brother Aiolia during Aiolia's fight with Seiya, when he demanded proof of Saori's identity as the goddess Athena. When the bronze saints were in the Temple of Sagittarius, the Sagittarius Cloth moved on its own (or with Aioros' spirit), and fired its golden arrow into a nearby wall—revealing a final hidden message of the gold saint's last will: "To you young boys who have reached this temple, know that I entrust Athena's life in your hands. Aioros." It is likely that Aioros foresaw that one day, new Saints would go to his temple to fight for Athena.