Marlena Moreau (mirror)

In the mirror universe, Marlena Moreau was a Human female who served as a scientist aboard the ISS. By 2267, Moreau had also became 's "".

As the "captain's woman" she was privilege to some of Kirk's darkest secrets, including knowledge about the deadly Tantalus field which had helped him to retain command of the Enterprise. During the crossover incident which saw several crewmembers (including Kirk) being swapped with their primary universe counterparts, Moreau assisted James T. Kirk in overcoming 's assassination attempt by using the Tantalus field to eliminate his henchmen. She then assisted Commander in returning the counterparts to their proper reality. 

In  continuity, Marlena assisted Spock in assassinating the mirror Kirk shortly after his return to the Enterprise following his genocide of the s. Following this she continued to serve as "captain's woman" to Spock and following an intense mind-meld became a staunch supporter of Spock's plans to reform the Terran Empire.

By the mid-2270s, Moreau and Spock had married. In 2277, Moreau secretly watched to see if she would assist Spock's plan to take the throne of the Empire by assassinating Empress Hoshi Sato III and her imperial guard using the Tantalus field. If Saavik had instead used the device to assassinate Spock, Moreau would have prevented her carrying it out by shooting her with a concealed phaser. Thankfully, Saavik supported Spock and Marlena was soon proclaimed Empress consort of the Terran Empire. (' : ')

The continuity follows The Sorrows of Empire continuity up until the planned assassination of Empress Sato III in 2277. In this divergence, Saavik used the Tantalus field to assassinate Spock and was in turn murdered by Moreau. Fortunately, Moreau was later able to escape the Enterprise's destruction by escaping to a special shuttlecraft with the help of Lieutenant.

After escaping from the Sol system, Moreau headed to Vulcan where she remained hidden by her father-in-law. Over the next twenty years, Moreau and Sarek established the resistance movement which was tasked with keeping Spock's ideals of reforming the Terran Empire alive as well as protecting those that had suffered at the tyrannical hand of the Empire.

Unfortunately, Moreau died during a raid on Rigel IV in 2298, but her legacy lived on way into the 24th century as the Maquis grew larger and contained supporters from the former Cardassian Union and the Romulan Star Empire which had been overrun by the Terran-Klingon alliance. ("A Burning House")