Cretia was a female Trill who lived in the 31st century. Cretia was an initiate and was assigned by the Trill Symbiosis Commission with Janra to accompany Dax on a mission to the Gamma Quadrant aboard a Starfleet transwarp vessel. Cretia and Janra were killed when the transwarp core of the vessel exploded. (ST short story: "The Law of Averages")