Leslie Thorne was a female Human who served in Starfleet in the 24th century. By late-2385, Thorne held the rank of lieutenant serving aboard Deep Space 9 on Chief Miles O'Brien's engineering staff. In December of that year, Thorne shutdown the entire anti-grav system in Nanietta Bacco Park believing it wisest until a failed power-transfer relay could be replaced, estimating completion to take twenty-six hours. (DS9 novel: Ascendance)