After Zero kidnaps Empress Tianzi, Kallen fought against Xingke in his Knightmare Frame, "Shen Hu", while defending the "Ikaruga" flagship from being attacked by a group of "Gun Ru"'s. After the Enuches plans were exposed to the media, Kallen, along with Zero, C.C., and Xingke, have worked together and attack the Enuches land fortress, "Leung Tan", leading them to their deaths while the fortress explode. After being confronted by a fleet of Britannian Knightmares, including the four Rounds, the group encountered an unknown Black Hole and Kallen was sucked in along with Zero and C.C.