After destroying several of the Six Nations flying fortresses, Arthur heads to one of his space fortress along with Shin to begin his plans. Toru decides to make a pact with Fredrika by becoming a Dragoon Cavalier in order to fight Arthur while Akari, Vivi, Leonardo, Red Chaika and her companions face off against Black Chaika and her minions. Assisted by Chaika and her Gundo sniper rifle to enter the space fortress, Toru battles against Shin before finally defeating him. Red Chaika faces off against Black Chaika before giving her the finishing blow, ending the latter controls of Alina, Irina, and the Chaika warriors. Finally facing Arthur, the Emperor beckons Toru to join his side since he believes war is what all of humanity wants but Toru refuses and he and Fredrika are swiftly beaten. Before Arthur can kill them, Chaika casts a shield to protect Toru and Fredsrika. Arthur tries to kill Chaika using Niva but Niva refuses and joins Chaika's side. With no more magic bullets to use, Chaika uses her memories as magic fuel for Niva's Cannon Gundo form where they finally kill Arthur and stopping his plans before Chaika loses conscious. In the aftermath, Alberic, now the new chief of the Kleeman Agency, reports to the Council of Six Nations that Arthur's plans were thwarted, Niva is under their custody and claims all of the Chaikas died. Elsewhere, Toru, Akari, Chaika, Fredrika and Red Chaika now live together where Toru helps a recovering Chaika.