Katrine is the French café owner and Resistance cell leader whom Captain Janeway is made to believe she is in the Hirogen's Second World War simulation in The Killing Game.
Katrine is the identity imposed on Kathryn Janeway in the fourth-season Voyager two-parter The Killing Game. The Hirogen have seized the ship and fitted the crew with neural interfaces that make them live as characters in holodeck hunts.
In the simulation of the occupied French town of Sainte Claire, Katrine runs the café Le Coeur de Lion, entertaining German officers while directing a Resistance cell from its back rooms. Her group, including a singer, a barman and a courier, gathers intelligence and prepares to support the approaching American army.
Once the Doctor and Harry Kim disable Janeway's interface she keeps up the part for a while in order to free the others, then leads the effort to retake Voyager.