Nevala was a Romulan female. She was second in command of a squad of Romulans who captured the USS Prometheus, a prototype long-range starship. When The Doctor appeared on the ship during an experiment to send his image over a Hirogen communication network, Nevala captured him. In order to access the controls and defeat the Romulans, The Doctor made up a story about a virus. Nevala was put in charge of observing him. He was able to subdue her and eventually took over the ship. (VOY: "Message in a Bottle")