Nyna Calixte was a Human female who was a Moff on the Moff High Council of the new Galactic Empire around 137 ABY. Prior to the Sith-Imperial War, Calixte was using the persona of Morrigan Corde, Imperial Intelligence agent. While out in the field, she had a chance meeting with Kol Skywalker, a member of the Jedi Council. The pair fell in love, married and had a son, Cade. However, claiming that the Empire recalled her back into service, Calixte left her new family when Cade was still a toddler. Shortly afterward, she abandoned her Corde persona for approximately two decades.

Back in Imperial service under her own name, Calixte became the Director of Imperial Intelligence, and was later appointed a Moff. She entered into a marriage with fellow Moff Rulf Yage, and they had a daughter, Gunn. However, the marriage would prove to be short lived, and Calixte entered into an affair with another Moff, the more powerful Morlish Veed. When the Sith approached the Empire in 128 ABY offering to help in the Empire's war against the Galactic Federation of Free Alliances, they did so through Calixte. She manipulated the other Moffs into accepting the Sith's offer, then plotted with Veed to place him on the Imperial throne. However, her plan was foiled when Darth Krayt claimed the throne for himself. In 137 ABY, she "reactivated" her Morrigan Corde persona to help keep Cade Skywalker from being turned to the dark side of the Force by the Sith.