For the primary universe counterpart, see Eris (Vorta).

In the mirror universe, Eris was a Vorta female in the service of the Dominion who lived during the latter half of the 24th century. Eris had a psionic ability like her counterpart.

In 2381, Eris travelled with First Taran'atar and his men, including Navigator Rogan'agar, aboard a Dominion battleship to a sector of space less than five light-years distant from the Idran system in the Gamma Quadrant to investigate a massive subspace fluctuation which had been detected by a deep space probe. It was located a great distance from Dominion space. They were able to determine that it was a stable wormhole and sent another probe to determine its endpoint. While they soon lost contact with the probe, Eris immediately reported their discovery to the Founders. She promised to mention Taran'atar by name for his role in the discovery. (ST - Mirror Universe novel: Rise Like Lions)

In 2386, Eris commanded Jem'Hadar Battleship 774 into the Alpha Quadrant as part of the Dominion's negotiations with the Galactic Commonwealth. (ST - Section 31 novel: Disavowed)

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