Hoshi Sato (mirror)

In the "Mirror universe", Hoshi Sato was a female human who became Empress of the Terran Empire and matriarch of the Sato Dynasty, which would rule the Empire for over a century.

Early Life
Sato was born in Kyoto, Japan, and spent most of her youth there. (ENT novel: Age of the Empress)

As an adult, she served as communications officer aboard the ISS Enterprise (NX-01). An opportunistic and duplicitous woman, she ingratiated herself to both Captain Maximillian Forrest and his rival, Jonathan Archer. Sato aided Archer in commandeering the USS Defiant in 2155; however, she betrayed him by seducing his personal guard, Travis Mayweather, into poisoning the captain. Sato then took command of the Defiant and, declaring herself Empress, attacked Starfleet and forced the Empire's military to recognize her as leader. (ENT episodes: "In a Mirror, Darkly" Parts I and II)

Empress Sato I
Sato established her imperial residence in the historic Kyoto Imperial Palace. One of her primary goals as ruler of the Terran Empire was to crush the rebel forces arrayed against the Empire. Toward this goal, Sato arranged to be married to General Thy'lek Shran of the Andorian Imperial Guard, thus creating an alliance and cutting off a key source of rebel support.

She also ensured that the true nature of the starship Defiant was kept secret, claiming it was from the Empire's future, rather than from a parallel universe where the Empire never existed. She also fabricated several "historical" facts she claimed to have found in the Defiant database, including the birth of a child to herself and Shran.

When Shran discovered the Defiant's true nature, he arranged to have Sato's ova taken from her, a child artificially gestated from their joined DNA, and then sent Sato into exile, while he took control of the Empire as regent for their unborn child.

Sato was sent to Deneva, but her transport was intercepted by Vulcan rebels. She was held prisoner, and then put on trial for the crimes of the Empire against its subject worlds. However, Sato was able to strike a deal with one of the rebels, and her former Enterprise crewmate, T'Pol. By helping her escape the rebels and helping reclaim the Empire from Shran's Andorian forces, the people of planet Vulcan were then raised to a status equal to that of humans. (ENT novel: Age of the Empress)

Sato personally executed the scientist $𝜇$, which halted scientific progress with artificial life-forms indefinitely. $𝜇$ speculated, decades later, that this may have been one of the factors that led to the Empire's demise. (TNG novel: The Worst of Both Worlds)

Sato's line continued to rule the Terran Empire until 2277, when Empress Hoshi Sato III was usurped by Emperor Spock. (TOS novel: The Sorrows of Empire)