One of the Delaney sisters, twin officers serving in stellar cartography aboard Voyager, long talked about by Tom Paris and Harry Kim and finally seen on screen in the episode Thirty Days.
Jenny Delaney and her twin sister Megan work in stellar cartography aboard the USS Voyager. For years the pair exist only in conversation, chiefly in Tom Paris's attempts to arrange double dates for himself and Harry Kim, one of which ended with Kim falling out of a gondola on the holodeck.
The sisters are finally seen in Thirty Days, when they join Paris and Kim in the Captain Proton holodeck programme, playing the Twin Mistresses of Evil, Demonica and Malicia.
In the same episode Kim admits that it is Megan who interests him, while Jenny is the one who keeps pursuing him, a situation Paris finds thoroughly entertaining.