Affiliation: United States Army Rank: Second Lieutenant Formerly of the U.S. Army Tactical Skills Research Unit. He possesses top-class skills and knowledge. Selected as the chief development pilot for the joint Japan-U.S. new Tactical Surface Fighter development project, "Project XFJ," he belongs to the project's development unit, the Argos Test Flight. He is half-Japanese and half-American. Due to experiencing discrimination against Japanese people caused by political friction between the two countries in his childhood, he harbors a hatred for Japan and maintains a cold, distant attitude. He pilots the Shiranui Second.

Affiliation: Imperial Japanese Royal Guard Rank: First Lieutenant A surface pilot of the Imperial Royal Guard, protectors of the Shogun's family. Born into the Takamura family, a prestigious fudai samurai house, she is a rigid person who constantly disciplines herself so as not to stain her family name or the reputation of her legendary soldier father. She is dispatched to Yukon Base as the Imperial Japanese project manager for "Project XFJ." Unable to hide her irritation at Yuuya's critical attitude toward Japan as someone sharing the same blood, they frequently clash. She pilots the Takemikazuchi (Yellow).

Affiliation: Soviet Army Rank: Second Lieutenant A pilot belonging to the Soviet Army's experimental unit, the "Idar Test Flight." She possesses overwhelming piloting skills and operates the two-seater Tactical Surface Fighter Su-37UB. Along with her co-pilot Inia, she is feared under the alias "Scarlet Twin." She is loyal to orders for the sake of her motherland and acts coldly toward those around her, but shows emotions that are neither quite love nor obsession when it comes to Inia. She pilots the Cherminator with Inia.

Affiliation: Soviet Army Rank: Second Lieutenant A pilot of the Idar Test Flight who, along with Cryska, is feared as the "Scarlet Twin." She possesses high piloting skills unimaginable from her young appearance and innocent behavior. She looks up to Cryska like an older sister and is deeply afraid of being separated from her. She often speaks and acts mysteriously and, for some reason, takes an interest in Yuuya. She addresses Cryska without honorifics and pilots the Cherminator with her.

Affiliation: Nepalese Army Rank: Second Lieutenant A pilot of the Argos Flight who is exceptionally competitive and quick to pick a fight. She comes from the brave Gurkha mountain people. She possesses high-level high-mobility combat skills and has developed her own close-quarters combat style using a "Khukuri Knife." She pilots the Shiranui Second.

Affiliation: Swedish Royal Army Rank: Second Lieutenant A pilot of the Argos Flight with precise judgment and accurate sniping skills. She is the brain of the flight, possessing a calm personality. While her sculpture-like beauty often makes her seem cold-hearted, she is actually a caring woman with a domestic warmth. She pilots the Active Eagle.

Affiliation: Italian Army Rank: Second Lieutenant The mood maker of the Argos Flight who keeps the atmosphere lively with his lighthearted Italian-style talk. He has a flighty personality, immediately approaching any woman he sees, but he is also caring. He possesses high piloting skills cultivated in actual combat on the European front and is highly trusted by his teammates for his situational judgment and maneuverability. He teases Tarisa by calling her "Chobi." He pilots the Active Eagle.

Affiliation: United Chinese Front Rank: Second Lieutenant The commander of the United Chinese Front's "Baofeng" Test Flight. She has a very aggressive personality and harbors a strong sense of rivalry, particularly toward the Argos and Idar test flights. Her combat style in a TSF is also aggressive and forceful, specializing in close-quarters combat using a long blade. She is respected and called "Big Sis" by her subordinates.

Affiliation: United States Army Rank: Second Lieutenant A pilot who was in the same unit as Yuuya during their time in the U.S. Army, where he always ranked second to Yuuya's scores. He currently belongs to the 65th Combat Training Aggressor Squadron, the "Infinities." Because he takes pride in being Japanese-American, he and Yuuya are at odds, and they fought constantly within the unit.

Affiliation: United States Army Rank: Second Lieutenant A pilot belonging to the 65th Combat Training Aggressor Squadron, the "Infinities." She has a cheerful and meddlesome personality but occasionally shows a side that tries too hard to be strong. She possesses sharp insight, which she demonstrates fully both during and outside of operations. She was a colleague of Yuuya and Leon during their U.S. Army days.