Yukikaze

The human race has beaten an invasion by an alien race called the JAM back to its home planet Fairy. Fairy Air Force, the UN-mandated military organization tasked with neutralizing and eventually eliminating the alien threat, assigns and armed strategic reconnaissance aircraft codenamed "Yukikaze" and equipped with an AI to Lt. Rei Fukai of the subordinate Special Air Force with the intention to record data on JAM movements and battlefield tactics. One day, however, an encounter with the "Grey Sylph" (a JAM duplicate of the Yukikaze) lands him in hot water with his superiors. During another patrol, Fukai is captured by JAM clones wanting to study the plane. He kills one of his captors and escapes with the plane from an alien entity disguised as a FAF forward airbase but ends up being pursued and shot down by the "Grey Sylph". As the "Grey Sylph" attempts to finish off Fukai's aircraft, the Yukikaze AI hijacks an FRX-99, a prototype UCAV that was undergoing operational tests at that time, and uses it to destroy the "Grey Sylph". The AI uploads its files to the FRX-99, ejects Fukai, and obliterates

The ordeals from the previous mission leaves Rei Fukai in a catatonic state, which proves short-lived when he responds to the Yukikaze AI, now transferred into the prototype FRX-00 Mave (a manned version of the FRX-99 that has been equipped with a countermeasure system to detect JAM computer infiltrations), as the latter strafes a FAF tactical airfield that it identifies as a JAM entity during a test flight. This and several suspected acts of sabotage made on other FAF aircraft raise alarms to some FAF officials, including Brigadier General Cooley, on possible JAM infiltrations. She assigns Rei to the prototype Mave under the observations of Edith Foss, who will soon have an opportunity to profile both Rei and Yukikaze under combat situations.

Rei and another Fairy Air Force crewmember investigate a Banshee flying aircraft carrier that opened fire on friendly forces prior. Further inspection on the seemingly-deserted carrier reveals that it is being used by JAM to create human clones. When transmission of their finding triggers the FAF's computerized command and control system into launching a SRBM to destroy the Banshee, Rei escapes, but his companion, upon discovery that he himself is a JAM clone, elects to stay behind onboard the doomed air fortress.

Rei and Yukikaze fly back to Earth to test the plane's new engines but JAM forces follow them out of the portal. An Earth-borne Japanese Navy aircraft carrier battlegroup, mistaking the JAM attackers for unauthorized FAF aircraft, is taken by surprise and quickly fall into disarray. The Admiral, the Japanese flagship, is only saved from a final ramming attempt by the aliens by Rei's timely intervention. The Yukikaze is forced to land on the Admiral for refueling, and it is right there Rei would find out how ignorant Earth has become to the war raging on Fairy.

Concluding that planet Fairy is in fact the collective of JAM itself and that JAM infiltrators are on the eve of starting a mutiny, the FAF devises a plan to lure JAM infiltrators into a trap while pulling the rest of their forces out of Fairy. In response, JAM arrays its entire fighting force between the FAF and their portal of escape and hijacks some of the FAF's UCAVs, causing chaos within FAF formations. Intent on settling scores with JAM, who have repeatedly tried to hack the Yukikaze AI, Rei Fukai and the AI launch in one final sortie to escort nuclear weapons into the heart of the JAM collective, giving the FAF the opening they need to escape and seemingly sacrificing themselves in the process.