Alzen

Alzen was a Srivani scientist who boarded USS Voyager under cloak to conduct covert medical experiments on the crew in order to obtain data for the Srivani medical database. After being captured, Alzen explained that the Srivani were conducting the experiments to get data to cure diseases with their race. The plot was foiled when Captain Kathryn Janeway threatened to destroy Voyager with them on it. (VOY: "Scientific Method")