|Constellation / star|
Cheiron's Light Impulse (ケイロンズライトインパルス, Keironzu Raito Inparusu)
Sagittarius Sisyphos (射手座のシジフォス, Sajitariasu no Shijifosu?) is the person who took Sasha to Sanctuary laying great hopes on her. During his known missions, he looked for information about Hypnos and Thanatos, finding about the four Dream gods.
During the invasion of Hades to the Sanctuary, he attacks Hades with a Gold Arrow but Hades reverts it easily piercing his heart, ending up in a comatose state. His Cosmo is then sealed by Hypnos and Thanatos, and his soul is trapped in the Dream World by the Dream gods. He later appears in the final dream of Taurus Aldebaran, reminding him how much it hurts Athena when one of her Saints dies.
He later awakes from his coma, having been rescued by Sasha during the fight between Oneiros and El Cid/Tenma. This enables him to assist his fellow Saints against the dream god, shooting his golden arrow from the Pope's temple in the Sanctuary, which is intercepted in midair and cut in four by El Cid, and then pierces the four weak spots of Oneiros, thus rendering him all but vulnerable.
He is entrusted by Hakurei to lead the forces of Athena during the absence of the Pope. It was also revealed that he refused being a candidate for the succession of the Pope.
He later appear in Jamir, to lead Athena's army into the Lost Canvas, by using the boat of hope. To defend the boat from the attack of Aiacos, Sisyphos uses arrows made of Cosmo, shooting them with his bow and his direct attack Cheiron's Light Impulse (ケイロンズライトインパルス, Keironzu Raito Inparusu?) a powerful blast of ray of light, that provokes a massive whirlwind, extinguishing all the fire that covered Aiacos' and Athena's ship. He was able to reach the eighth sense after blinding himself. Because of the massive level of Cosmo he reached, Sisyphos was able to defeat Garuda Aiacos.
Entering the Lost Canvas, Sisyphos put his heart as a test to Pharaoh's curse, managing to get as pure as the Feather of Maat, then slaying the Specter with his technique. His heart however was ripped out of his chest, causing his death. In a final assault, the Sagittarius Gold Saint managed to help Leo Regulus and Aries Shion to perform the technique forbidden since ancient times, Athena Exclamation (アテナエクスクラメーション, Atena Ekusukuramēshon?), that allows three Gold Saints to provide a monstrous amount of Cosmo capable of reaching a Big Bang in a small scale, releasing it as a single and outstanding blow, destroying the gates of the Lost Canvas.Before his death, it is revealed that Sisyphos' feelings and motivations to protect Sasha went beyond simple devotion as a Saint. He last appears in spiritual form during the attack of golden light unleashed by the Gold Saints on Hades.