She had several elder siblings. Her father François Moreau regularly beat her as a child, particularly after he had been drinking.
In 2266, she was on the ISS Enterprise, and was the captain's woman of James T. Kirk. After Spock assassinated the captain in 2267, Marlena became his wife and was with him throughout his career as he rose to Admiral and later Emperor of the Terran Empire, she supported his movement to disarm the Empire and transform it into the Terran Republic. (TOS - Mirror Universe novel: The Sorrows of Empire)
In the late 23rd century, while reported officially as being on Luna, Moreau secretly attended a Vulcan conference with her husband. The purpose of the conference was to organize Vulcans into a silent resistance, following the anticipated downfall of the Terran Republic. (VOY - Mirror Universe novel: The Mirror-Scaled Serpent)
In 2295, Marlena stood by her husband in the Forum of the Terran Republic when the forces of the Klingon-Cardassian Alliance invaded Earth and executed her and Spock. (TOS - Mirror Universe novel: The Sorrows of Empire)
By most accounts she underwent a change of loyalties after the return of her captain's counterpart to the Federation (TOS novel: Dark Mirror), and in The Mirror Universe Saga she served in David Marcus's underground. It may have been she who convinced the Drs. Marcus to question the Empire, because in that timeline Spock did not come around to that way of thinking until much later.
|ISS Enterprise (NCC-1701) personnel|
|Phillip Boyce • Christine Chapel • Pavel Chekov • J. Mia Colt • Robert D'Amato • Willard Decker • Michael DeSalle • Fein • Finney • Karl Franz • Gaffney • David Garrovick • Hadley • Ilia • James T. Kirk • Winston Kyle • Roger Lemli • Jabilo M'Benga • Leonard McCoy • Marla McGivers • Marlena Moreau • Number One • Carolyn Palamas • Elizabeth Palmer • Christopher Pike • Janice Rand • Kevin Riley • Saavik • Montgomery Scott • Elizabeth Sherwood • Solok • Spock • Stang • Hikaru Sulu • Nyota Uhura • Xon • unnamed ISS Enterprise personnel|