During the initial period of the Galactic Empire, Hydra held the position of Grand Inquisitor within the Inquisitorius. Following Malorum's death in 18 BBY, she took over his role as Grand Inquisitor. Sano Sauro, a former Senator, mentioned his professional dealings with Hydra in a discussion he had with Bog Divinian, who was the Imperial Governor of Samaria. Subsequently, Hydra accompanied Ferus Olin on a mission to Alderaan to locate a Force-sensitive child. She was characterized by her distinct lack of emotional expression.