Luger

Luger is a Shadow Marshal, serving in the Interplanetary Strategic Alliance. She is one of the main protagonists in Killzone, and a supporting character in Killzone: Liberation, acting as a guide to the player.
She helped stop the space defense platform crisis, and guided her old boyfriend, Jan Templar, into driving the Helghast off of Vekta. Her involvement in the war is shrouded in mystery, due to her secretive profession. It is not even known whether Luger is her surname, or simply a codename.