Layna was an actress living on an L-class planet in the Delta Quadrant.
In the plays written by Kelis about the USS Voyager, she portrayed both B'Elanna Torres and Seven of Nine (who was later revealed to be none other than the Queen of the Borg). She became jealous of the real Torres as she thought Kelis' relationship with Torres was threatening her romance with Kelis. Layna tried to ruin the play by telling the patron that Torres was really an Eternal. The patron believed that this was part of the play and that Layna was playing the part of the jealous girlfriend. The show was a success. (VOY: "Muse")
Layna was played by Kellie Waymire. Her name was not spoken on screen, but rather originates from the episode's script.