Diane Overdiek was a Starfleet officer in the 24th century.
In 2371, she was a crewmember aboard the USS Voyager. She was among the crew stranded in the Delta Quadrant, when Voyager was forcefully brought there by the Caretaker.
In 2374, as a lieutenant, she was listed on a crew manifest. (VOY: "The Killing Game")
This character was only mentioned in writing.