In the mirror universe, Rogan'agar was a Jem'Hadar in the service of the Dominion who lived during the latter half of the 24th century.

In 2381, Navigator Rogan'agar traveled with Eris, First Taran'atar and other Jem'Hadar 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. Rogan'agar detected a disruption in the ship's subspace field as it dropped from warp speed to impulse, which prompted them to check for deformations in the local fabric of subspace. 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. (ST - Mirror Universe novel: Rise Like Lions)

It is unknown if Rogan'agar has a counterpart in the primary universe.
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