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No direct information exists for a character named Elisa within the Saint Seiya franchise. This name appears to be a confusion or mistranslation. The character in question is almost certainly the antagonist of the 1987 film Saint Seiya: Evil Goddess Eris, whose name is Eris, also mistakenly referred to as Ellis or Elisa in some sources.

This character is the goddess of Discord and a primary enemy of the goddess Athena. Having been exiled for years, she returns to Earth seeking revenge against Athena, who had previously drained her of her life energy. To manifest in the world, Eris uses a golden apple with powerful magical properties. This apple is used to tempt and take possession of a young woman named Eri Aizawa, a caretaker at an orphanage who had close ties to some of the Bronze Saints. By seizing control of Eri's body, Eris is able to interact with the physical world and pursue her destructive goals.

Once she has taken a host, Eris's primary objective is to fully restore her own power and seize control of the world. To achieve this, she kidnaps Saori Kido, the reincarnation of Athena. She imprisons Athena and places the golden apple before her to steadily drain her life force and divine energy, which would allow Eris to complete her resurrection and no longer need the body of her human host. Her actions are motivated by a deep-seated chaos and a desire to plunge the world into conflict, acting on her nature as the embodiment of discord. In addition to capturing Athena, she resurrects a group of five deceased Saints who had betrayed Athena in life, known as the Ghost Five, to serve as her loyal warriors and fight on her behalf.

The character's key relationship is her antagonism toward Athena, viewing her as the primary obstacle to unleashing chaos. She also has a parasitic relationship with her human vessel, Eri Aizawa, who she uses as a tool without regard for the girl's own will or well-being. Eris demonstrates significant power as a malevolent deity. Her most notable ability is the use of the golden apple, which serves both as a tool for possession and as a means to drain the life force of a goddess. She also possesses the supernatural power to summon and reanimate the souls of dead Saints, binding them to her service as the Ghost Five. The goddess wields a scepter in battle and seems to have no qualms about betraying or sacrificing her own followers, as she demonstrates by fatally striking one of her Ghost Saints, Southern Cross Christ, from behind during his fight with Cygnus Hyoga, seeing it as a strategic opportunity.

Over the course of the film's story, Eris does not undergo development or change. She remains a singularly focused and scheming villain whose only goal is the destruction of Athena and the domination of the world. Her role in the narrative is that of the final obstacle for the protagonists. After the Bronze Saints defeat her Ghost Five warriors, the hero Pegasus Seiya is empowered by the spirit of the deceased Gold Saint, Aiolos of Sagittarius. Donning the Sagittarius Gold Cloth, Seiya fires a golden arrow that pierces the golden apple, shattering it and destroying Eris's link to the living world. This act frees Athena and the captive Eri Aizawa, while Eris herself is banished back to the realm of the dead.