Hanor Pren was a Trill scientist at the Trill Science Ministry. In 2372, he traveled with Dr. Lenara Kahn and Dr. Bejal Otner to Deep Space 9 to conduct an experiment in creating an artificial wormhole. Pren was suspicious that Lenara and Jadzia Dax might reassociate, but Bejal told him his concerns were groundless. (DS9: "Rejoined")