Droo was a Trevan soldier of the 24th century. In 2364, Droo searched Treva's Presidential Palace grounds for Lieutenant Tasha Yar after she went missing, without success. Droo reported this to Jokane, and President Nalavia interrupted and granted Droo the authority to take as many soldiers as necessary to hunt down Yar. Lieutenant Commander Data eavesdropped on a communication between Droo, Jokane, and Nalavia. (TNG novel: Survivors)