切り札の次元兵器を逆手に取られ、新統合軍第47特派艦隊は壊滅。人類の命運を賭けたウィンダミアとの決戦の行方は、Δ小隊とワルキューレたちに託された。オペレーション｢ラグナロク｣、命懸けのライブが今はじまる――

비장의 카드인 차원 무기를 역이용당하며 신통합군 제47 특파 함대는 궤멸한다. 인류의 운명을 건 윈더미어와의 결전의 향방은 델타 소대와 왈큐레에게 맡겨졌다. 작전명 '라그나로크', 목숨을 건 라이브가 지금 시작된다.

王牌的次元兵器反被取下，新统合军第47特派舰队被毁灭。堵上人类的命运与温德米尔决战的去向，被托付在Δ小队和Walküre的身上。开始执行“诸神之黄昏”，命悬一线的LIVE现在开始——

與溫迪米爾之間的決戰賭上了人類的命運，是輸是贏都掌握在Delta小隊與Walküre的手中。

與溫迪米爾之間的決戰賭上了人類的命運，是輸是贏都掌握在 Delta 小隊與 Walküre 的手中。

With the N.U.N.S. fleet wiped out by their own weapons, the final battle on Ragna is now just between Chaos and the Windermereans. Seeing the burden of shouldering the deaths of countless lives, Heinz ponders on negotiating peace talks with the N.U.N.S. while Roid prepares Mikumo on the Star Temple. Heinz orders Mikumo to sing the Song of the Stars, sending delta waves throughout the Brísingr Cluster, only to realize that Roid's objective is to bring the entire galaxy under his sole control in a Vajra-style hive mind. As both factions are mentally trapped by Mikumo's song, Heinz urges the Aerial Knights to take down Roid while Freyja tries to free her comrades from the spell. Hayate, Freyja, and Mirage's feelings for each other enable Chaos and the Aerial Knights to break free, and the combined might of Walküre releases Mikumo from Roid's control before both factions break through the Star Stage. As Hayate, Mirage, and Freyja rescue Mikumo, Keith ends the conflict by killing Roid before he himself is consumed by the destruction of the Star Stage. In the aftermath of the battle, Heinz orders the remaining Windermerean forces to retreat as the Brísingr Cluster is freed from Windermerean control.