Lucas Kellan is the main protagonist in Killzone: Shadow Fall. His father dies when trying to escape the invasion of half of Vekta,called 'New Helghan'. Thomas/Elliot Sinclair raises him and makes him a Shadow Marshal in the VSA (Vektan Security Agency). Lucas later gets pulled off his mission by Echo,and works with her to destroy the 'Weapon'. Sinclair feels betrayed as he ordered Lucas to kill Echo,but he didn't as Echo had saved his life previously,so Sinclair finds him in the 'Weapon' and shoots Lucas in the head.