Saint Seiya: Saintia Sho

Shoko, a student at Ryuusei Private Academy Middle School, is attacked by mysterious beings known as Dryads, minions of the sealed evil goddess Eris. Her missing sister, Kyoko, had left for study abroad five years earlier. When Shoko meets Saori Kido, who is connected to the Galaxian Wars, events set in motion a larger cosmic conflict.

Shoko is shocked to learn that Kyoko was chosen as the host for the evil god instead of her. Determined to rescue her sister, Shoko resolves to become a Saintia, and Saori arranges for her training under the Silver Saint, Mayura. Meanwhile, Milo and Aiolia detect unusual activity from the evil goddess Eris at the Sanctuary.

Malice Emony and Murder Phonos, henchwomen of the goddess Eris, conspire to steal Athena's sacred head in an attack on its guardian, Saori. Mii confronts Emony over her insults toward Saori, while Shoko experiences a sudden surge of power during training with Mayura. As Shoko senses a threat to Athena, she must determine if she can protect Saori from the coming danger.

Shoko enters Eris' temple after Phonos and begins searching for her sister Kyoko, only to learn a startling truth from Ate. When Ate attacks Shoko with vines, she is suddenly surrounded by golden light. Mii later joins Shoko at the temple, where they discover Kyoko's battered body.

Kyoko's Cosmo is lost during the battle at Eris' temple, causing Saori to doubt her role after failing to save Kyoko in their fight against the evil god. As Saori embraces Mitsumasa Kido's will, the Galaxian Wars begin. Meanwhile, Shoko, still in the hospital and grieving Saori's farewell, drops her Pegasus pendant, which is caught by Pegasus Seiya as he joins the Galaxian Wars.

Aphrodite of Pisces brings Athena to the Sanctuary at the Grand Master's request for a confrontation, raising questions about his hidden motives. Meanwhile, Mayura discovers that the remnants of Eris are causing a potentially devastating phenomenon.

As the golden arrow hits Saori, the Ghosts awaken, causing chaos. Shoko, the vessel of the evil god, loses consciousness as her soul is drawn by the Ghosts. Mayura and the Saintias attempt to pacify the spirits, while Seiya and the Bronze Saints race through the Sanctuary to protect Athena, leading to a fierce battle across the twelve temples.

Following a deadly battle, the Saints of the Sanctuary pledge their loyalty to Saori, who claims to be Athena. Unbeknownst to them, Eris has merged with her host, Kyoko, greatly increasing her power. As Saori confronts Eris to protect Shoko, she is cursed by the apple, prompting the Gold Saints and Saintias to journey to the Temple of Eris to rescue Athena and prevent Eris from spreading the Evil Seeds of war.

Shoko struggles with the burden of facing her sister, who has merged with an evil god, as Orion Rigel, a ghostly former Silver Saint, appears before her. Sensing the depth of Rigel's emotions tied to his past with Kyoko, Shoko prepares for the battles ahead, including Mii against Emony and Aiolia against Saga, as the conflict unfolds in the Temple of Eris.

Shoko and the Saintias unite to confront the evil god Eris as Saori's strength wanes. Meanwhile, the Gold Saints defend the Sanctuary and uncover Eris' plan to destroy it by crashing the temple into it. As Aiolia and Milo prepare to destroy the temple, a climactic battle unfolds involving all the key characters.