 As Kallen walks away feeling betrayed, he whispers "Kallen, you must live on" within earshot.She unsuccessfully tries to get the Black Knights to wait after their first attempt to kill Zero fails thanks to Rolo Lamperouge, and is left standing on the hangar floor when Rolo uses his Geass to escape with Lelouch.After Lelouch's escape, Kallen tries to protest how Ohgi and the others have discarded Zero so readily despite all that he has done for them, but they refuse to listen, still angered at the idea that they were merely being used as pawns.