第 16 集: Efy Dolgh 戰士潛入黑部水壩，Sophie 與 Kennosuke 辯論自由

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Efy Dolgh fighters, Muetta and Mirasa, arrive at Kurobe Dam. Ogino and the school group travel to find a location to film her cosplay. She has asked Marina along to lift her spirits after she tendered her resignation because of the Efy Dolgh attack at the school's cultural festival. The UN plans for Sophie's departure for France and trial single-pilot GAUS units to increase their capacity to deal with the enemy geoframes, but with mixed success. Kennosuke and Sophie discuss the meaning of freedom. Meanwhile, Muetta and Mirasa gain entry to the UN facilty. They capture Kennosuke, who still believes that Muetta is Princess Yukihime, but she denies knowing him. They find the excavation site with the final fragments of the hinge stone. Confronted by UN troops, Kennosuke tries to defend Muetta, but Sophie says that he is foolish, and vows to stay at the facility. As they are about to leave, Mirasa stabs Muetta so that she can take sole credit for the discovery. Muetta jumps from the dam wall into the rushing waters below. (Source: Wikipedia)