Trill scientist who worked on artificial wormholes. In 2372, Pren visited Deep Space 9 with his colleagues in an attempt to create an artifical wormhole. One of his Trill associates who accompanied him, Dr. Lenara Kahn, had a previous relationship with Torias Dax (a previous host of the Dax symbiont) when the host of the Kahn symbiont was Nilani.