Kallen appears early in the first episode, driving a truck with C.C.'s capsule, and then providing cover by fighting Jeremiah in a "Glasgow". After Lelouch gains his Geass from C.C., he takes control of an enemy "Sutherland" and helps Kallen to escape the other Knightmare Frames chasing her. He further directs the remaining resistance forces in the battle, granting them a decisive advantage until Suzaku Kururugi uses the "Lancelot"'s superior systems to overwhelm their forces. She sacrifices her own machine to allow Lelouch to escape, despite not knowing who he really is.