Moira Rossa was a Human woman living at the Federation colony on Galen IV in the 2350s, wife to Connor Rossa and the mother of Jeremiah Rossa. Her mother-in-law was Admiral Connaught Rossa.

In 2357, while Galen IV was under attack by the Talarian militia, Moira tried to escape into the forest with Jeremiah, but the Talarians found and killed her, leaving Jeremiah as the only survivor. (TNG: "Suddenly Human")

Moira Rossa was portrayed by an unknown actress in the photographs and a different unknown actress provided her voice.