The mirror-universe counterpart of Hoshi Sato, communications officer of the ISS Enterprise, who uses her closeness to successive commanders to seize the USS Defiant and proclaim herself Empress.
In In a Mirror Darkly, Hoshi Sato is the communications officer of the ISS Enterprise and the companion of Captain Forrest, a position she keeps under Commander Archer once he takes over the ship. Her skill with languages is still essential: she is the one who makes sense of the Tholian signals during the raid on the drydock holding the USS Defiant.
She survives the loss of Enterprise and joins Archer aboard the Defiant, apparently as his loyal consort. In the second part she interrogates T'Pol after the failed plot against the ship.
As Archer prepares to take the Empire, she poisons his drink with the help of Sergeant Mayweather, then brings the Defiant to Earth and announces to Starfleet Command that it is now answering to Empress Sato.