Sirius of Canis Major

Sirius is a 17-year-old boy with fair skin and an athletic build due to his training as a Saint. His physical appearance seems older due to his elongated face and flat chin, as well as his height of 1.85 meters. Furthermore, his facial features also make him appear older than his age, with some well-defined wrinkles or marks on his face at eye level, and he has a large mouth and a long, thin nose. His hair is a deep navy blue and so long that it reaches below his shoulders.

Sirius is a person who can team up with his companions to complete their mission and is a Saint loyal to Sanctuary and Athena who was only a victim of the lies of the imposter Patriarch. He is a person who shows no compassion towards his rival, once he has decided to take a life, he will not rest until he kills him. Although this trait of his personality may make him seem like a cruel and sadistic warrior, he is quite the opposite, as he sought to take Seiya's life to avenge his companions, the Silver Saints, who were killed by him. Therefore, he is a warrior who appreciates his companions and is willing to avenge their deaths, even if this mission may cost him his life. He is a warrior committed to his mission and will not let anyone stand in his way, even if it is someone of higher rank like a Gold Saint. Seeing that Aiolia had decided to postpone the fight with Seiya, he claims him and even questions his loyalty, reminding him that he was the brother of a traitor and, seeing that his words had no effect, he simply decided to ignore him and continue with the mission to assassinate Seiya.

Sirius, along with Dio and Algethi, travels to Tokyo (Japan), by order of the Patriarch, to ensure that Aiolia fulfills his mission of eliminating the traitors. After Aiolia injured Shaina, when she was trying to protect Seiya, and due to what happened he decided to spare Seiya's life for that occasion, Sirius and the Silver Saints who accompany him appear. Seeing that Aiolia of Leo has decided to postpone the fight, Sirius questions Aiolia of Leo's loyalty reminding him that he is the brother of the traitor Aiolos of Sagittarius, but when he does not convince him to go ahead with the fight, he tells him that if he cannot end Seiya's life, they will. After speaking with Aiolia, Sirius says to Aiolia of Leo: "Ha ha ha! We've been spying on you, Aiolia, by order of the Pope. You are the brother of Aiolos, the traitor of the Sanctuary, there was a certain fear that you would not obey. The Silver Saints begin their attack against Seiya, the first to attack him is Algethi who uses his Kornephoros to throw him into the sky. However, before he crashes to the ground, Dio interferes by holding him and tells Algethi that Seiya's head is not only his and that he will also avenge his companions who were killed, then hits Seiya with his Dead End Fly, but now the one who intervenes is Sirius, who also claims his enemy's head by grabbing Seiya's neck and saying: There am also me, Sirius, from the constellation of Canis Maior. What are you doing? Not only you want to avenge the Silver Saints!

The Silver Saints argue over who will end Seiya's life, although any of their techniques would be enough to achieve it. In the end, they decide to throw Seiya into the sky to attack him all at once. Algethi holds Seiya to throw him while indicating that no matter who ends his life, there will be no hard feelings. Shouting "let's go," he throws him. When the Silver Saints are about to attack him, a golden glow illuminates the sky, to the surprise of those present, who realize that it is the Cloth of Sagittarius. Even when Aiolia warns them of the danger they are in, it is too late. The Cloth of Sagittarius dresses Seiya's body, and in an instant and with a single movement, he ends the lives of the Silver Saints. A year later, Sirius is one of the Silver Saints who pretended to swear loyalty to Hades in exchange for a new life and thus test the strength of the Bronze Saints. Once again, Sirius teams up with Algethi and Dio, and the three head to Tokyo, Japan, to challenge Shun. Shun is surprised to see them since they died, but they explain that they were resurrected by Hades. The Silver Saints begin their attack on Shun, but he easily dodges them and warns them that he doesn't want to hurt them. They take advantage of this moment to attack him using their techniques. After being beaten by his opponents, Shun gets up again, this time with his Cloth and the determination to defeat them, then uses his Nebula Chain, killing all three of them. Before dying, Sirius tells him "that the three Silver Saints were defeated" and then with a smile says "how good."

•Great Mountain Smasher: Sirius ignites his cosmos to the maximum, and then concentrates it in his fist, while he launches himself against his rival at great speed, his helmet emits a blue glow and his body is surrounded by an aura of energy as if it were a comet, the opponent is hit with the force that concentrates his fist at great speed