Kyōko of Equuleus

Kyōko is a beautiful woman with long, fine, dark hair. Her features are ragged and delicate, imbued with elegance. Despite being a female Saint, she does not wear a mask due to her position as a Saintia.

Kyoko is a kind and very calm person. She has a calm disposition and is loyal to her mission of protecting Athena as Saintia. She loves her younger sister and has promised to protect her, as well as never abandon her again after their reunion.

When she was still a child, she managed to save her sister Shōko from the clutches of Atë by entering her illusion and getting her to reject the Golden Apple, but before they could escape, they were attacked by Atë, after which they were saved by the Golden Saint, Milo of Scorpio. He told them that they were both born under the star that marks the resurrection of Eris, which is what motivates Kyoko to become a Saint of Athena in order to change the destiny of her and her sister. Years later, when Shōko was attacked by a mysterious woman, Kyōko appears saving her younger sister, introducing herself as Kyōko of Equuleus, a Saintia in service to the goddess, Athena. Once there in the Kido Mansion the girls are attacked by a group of Dryades which they defeat but are defeated by their leader Atë so Kyōko distracts the Dryade so Shōko escapes, but is defeated and saved by Saori who then faces Atë but they become human shields to defend their goddess, however they are defeated by the Dryade. Saori returns to face Atë with the help of the Sagittarius armor but they are defeated by it which causes the ritual of resurrection of Eris to begin but so Shōko is trapped by the roots that grow from the ground, while from the Golden Apple begins to emanate a winged serpent that seems to be the soul of Eris but before this could enter Shōko's body, Kyōko gets between them. Thus becoming the body of Eris, at that moment great flashes of light come out of Kyoko announcing the complete resurrection of Eris, disappearing along with Atë.

Shortly after being possessed by the spirit of the goddess Eris, Kyōko is taken by Atë to the shrine of the goddess Eris, where Kyōko is imprisoned in a tree, thus being completely possessed by the goddess. Because of this, she loses consciousness and is in a state of suspended animation, as if dead. Later, Eris, through Kyōko's body, releases a large amount of seeds, in the form of shooting stars throughout the world, even reaching the Sanctuary, these seeds become poison, which spreads throughout the world in the form of evil. During the fight between Shōko and Eris at the Kido Mansion, upon seeing her sister, Kyōko manages to take control of her body for a few moments, but Eris quickly takes control of her body again and prepares to attack Athena and her guardians. Finally the united cosmos of Athena, Shōko along with Kyōko's spirit attacks the goddess of discord, wounding her spirit. When Athena tries to get Kyōko to ignite her Cosmos to help them separate her soul from Eris's. The goddess of discord decides to leave her Yorishiro to take Shōko as her replacement, however at that moment Kyōko retains the goddess's soul and asks Athena to finish her off while she can still hold it, even if it means ending her own life as well. Let's see this Rigel screams the young woman's name as he tries to reach her, but a ray of light hits him. Milo decides to go ahead since there is nothing they can do to save her, and defeat Eris but also with Kyōko|young. As she fades away, Eris's spirit tells them that although she has been defeated, she will be able to return as long as the conflicts exist.

Later Eris who had been thrown to the confines of space by Athena, returns to Earth, on Earth Eris who has apparently become one with Kyōko begins to call Shōko to whom she takes to a garden brother, there Kyōko / Eris prepares to eat with her sister but she asks her the reason why she had called her to which Kyōko / Eris replies that the Earth will disappear very soon and that it was a pity that Athena had not had enough power to completely seal Eris, then Kyōko / Eris mentions that the Womb was going to revive and flourish causing people to destroy each other generated by their selfish desires then Kyōko / Eris tells her that afraid that one day despair would end with Shōko and that is why she decided to take her to that garden where they can spend eternity together but to her surprise Shōko replies that Kyōko would never would wax and then mentions that her sister had given her life to protect her and the earth and that is why she does not want the false world that Kyōko / Eris proposes so she attacks her but fails to which her sister replies that that is not how it is done and that if she is going to treat her as an enemy she has to pay more attention to where she aims and then tells her that she has become stronger and reminds her that since she was little Shōko followed in her footsteps and asks her if she cried a lot when she had left, then she asks her if Shōko did not always do what she told her and since Shōko is a good girl she will do what she orders while in her right hand she generates a small discharge of energy but at that moment they are interrupted by Athena escorted by Milo of Scorpio.

Athena mentions that it seems Kyōko and Eris have become one and that the desire inside Kyōko has been increased and corrupted by Eris's cosmos but Kyōko/Eris tells her that she was wrong since now she feels "free" and that she has learned that fighting for one's own desires is the most wonderful thing there is. Hearing this Athena asks her if that was the reason why she will make all human beings fight each other, to which she answers yes since she is Eris, the goddess of war who loves and watches over all battles, after this Kyōko/Eris leaves the place accompanied by Rigel. After their meeting, Kyōko/Eris is on her throne watching Shōko through the Golden Apple and then asks Rigel if she was pretty since she was trying to be a source so as not to get nervous, to which Rigel does not answer but notifies her about the arrival of one of the Saints and asks for permission to intervene, but Kyōko/Eris tells him that it is not necessary since he should be able to take care of the matter alone, then she asks him to stop being "so formal" and call her Kyōko.

•Equuleus Ryūsei Ken: Concentrates his cosmos to the maximum in his fist and then launches several punches at high speed, which take on the appearance of fleeting meteors. The cosmos or energy concentrated in the fist is fired with each punch. •Tempest Equuleus: To execute this technique, Shoko raises his cosmos, then makes seven spheres of energy with cosmos colors similar to the rainbow appear before him and then they are thrown simultaneously at the enemy. •Supernova Explosion: Concentrates all of his cosmos to create a powerful fireball, which he then throws at his opponent. When the opponent is hit, an explosion is created. •Supernova Explosion Maximum: This is a powerful technique with which the user ignites his cosmos by concentrating it in his hands, drawing a circle with it that becomes a large sphere of energy that is then propelled against the opponent.