Trelos Vren was an inhabitant of Deep Space 9.
He had once been arrested for attempting to break into the station's assay office. Later, in 2372, he was arrested outside the Klingon restaurant and Odo held him on four counts of petty theft.
Odo reviewed the case with Kira Nerys, joking that one might "have to admire his persistence" despite his lack of success. (DS9: "Indiscretion")
This character was only mentioned in dialogue.