Hayate, a young part-time worker at the port of the planet Al Shahal, encounters Freyja, a girl who has hidden away in a container. She has travelled from her home planet to audition for the Tactical Sound Unit Walküre.
Delta Flight and Walküre quell the riot, forcing the attackers to withdraw from Al Shahal; Freyja travels with Hayate to planet Ragna for the Walküre audition but learns she is ineligible without qualifying. She begs Mirage for a chance to audition.
Mirage, opposing Hayate's enlistment in Delta Flight, is assigned as his instructor. Hayate ignores her, skipping training except for practical flying lessons to chase Ragna's mercats. Frustrated, Mirage focuses on teaching him flying skills.
Before her debut as a Walküre at a vaccine concert on Randall, Freyja was restless. Just before the performance, Mikumo asked her what feeling she sings with. Freyja made up her mind to sing as a Walküre.
The Aerial Knights, who wield the Var with the legendary Singer of the Wind, swiftly brought down two stars; despite suspicions that Freyja is a spy, she maintains a determined and cheerful facade so those around her see through it.
Xaos and the New U.N. Spacy lose ground to manipulated soldiers infected by Vár; Messer scolds Hayate, who targets only the wings of enemy aircraft instead of the cockpit and warns him that such naive tactics will lead to his demise.
Yuma Uchida
Hayate Immelmann
Minori Suzuki
Freyja Wion
Asami Seto
Mirage Farina Jenius
Ami Koshimizu
Mikumo Guynemer
JUNNA