Commander of Special Task Force A-01. Rank: Captain. Position: Gun Interceptor. Leader of A-Platoon. Age: 23. Contrary to her cold, perfectionist impression, she is very caring and looks out for her subordinates, especially regarding their romantic troubles. During operations, she upholds the unit's ironclad rules: "Devote your life to the mission," "Do your best as long as you live," and "Never die in vain," leading them through harsh battlefields. Called "Michiru" by Hayase, Munakata, Kazama, and Haruka. Called "Captain Isumi" or "Commander" by her juniors. Pilots a Shiranui (Isumi Valkyries Specification).

Vice Commander (Number 2) of Special Task Force A-01. Rank: Lieutenant. Position: Storm Bunger One (Assault Vanguard Leader). Leader of B-Platoon. Brave, cheerful, and boisterous, yet hides a delicate heart. She is best friends and rivals with her classmate Haruka Suzumiya. She is quick to get defensive and is constantly teased by Misae Munakata. She has a low tolerance for alcohol and becomes a messy drunk. While she is a reliable senior who leads her juniors with a frank and bright personality, she is fundamentally sensitive and compassionate, possessing a dangerous tendency to sacrifice herself for others. Called "Mitsuki" by Michiru, Munakata, and Kazama. Called "Mitsuki" (with affection) by her best friend Haruka. Called "Mitsuki-senpai" by Akane Suzumiya. Called "Lieutenant Hayase" by her juniors. Pilots a Shiranui (Isumi Valkyries Specification).

Number 3 of Special Task Force A-01. Rank: Lieutenant. Position: Gun Interceptor. Leader of C-Platoon. She often bewilders those around her with eccentric words and actions. Frequently seen with Touko Kazama, leading to rumors about their relationship. As the "Number 3" of the A-01 Company, she is quick to grasp Captain Isumi's intentions and provides tactical and emotional support to Vice Commander Mitsuki Hayase from a step back. Called "Misae" by the senior members. Usually called "Misae" by her partner Kazama. Called "Lieutenant Munakata" by her juniors. Pilots a Shiranui (Isumi Valkyries Specification).

Senior Second Lieutenant of Special Task Force A-01. Position: Blast Guard (Suppression Support). Soft-spoken, refined, and ladylike. She possesses a broad perspective and looks after the unit members both on the battlefield and in the rear. She plays a mediating role between the strong personalities of the vanguard and rearguard, specifically Mitsuki Hayase and Misae Munakata. With her calm and elegant speech, she appears to be a well-bred young lady. However, in contrast to her appearance, she is the unit's fastest eater (a glutton), a surprising gap in her character. Called "Touko" by the senior members. Misae Munakata especially calls her "Touko" half-teasingly for her slow-paced nature. Called "Second Lieutenant Kazama" by her juniors. Pilots a Shiranui (Isumi Valkyries Specification).

Senior Second Lieutenant of Special Task Force A-01. Position: Gun Sweeper (Assault Cleanup). Has a bright and frank personality but also a hot-blooded side. Best friend of Chizuru Sakaki; she graduated from the academy and was commissioned six months early. Younger sister of Haruka Suzumiya. Served as a squad leader during her time as a cadet. She has an active personality that is the polar opposite of her gentle sister, Haruka. She has strongly admired Mitsuki Hayase since childhood, mimicking her speech and tomboyish frankness, and aims for the Assault Vanguard position to stand on equal footing with her. Called "Akane" by senior members and peers. Pilots a Shiranui (Isumi Valkyries Specification).

Senior Second Lieutenant of Special Task Force A-01. Position: Impact Guard (Artillery Support). Same class as Akane Suzumiya. Though she has a dry side, her bright, cheerful, and friendly nature prevents conflicts with those around her. She has two younger brothers awaiting conscription. To survive the harsh battlefield, she has become a surface pilot with extremely cold and realistic views, representing characters who know one cannot survive on ideals alone. Called "Kashiwagi" by senior members and peers. Pilots a Shiranui (Isumi Valkyries Specification).

In charge of Theater Control for Special Task Force A-01. Rank: Lieutenant. Position: Command Post (CP) Officer. Airheaded, kind, and gentle, but possesses a strong heart. In the same class as Mitsuki Hayase and is the older sister of Akane Suzumiya. Originally aimed to be a "Surface Pilot" alongside Mitsuki, but gave up due to a lack of aptitude and past trauma. However, out of a strong desire to support her comrades fighting on the front lines, she remained in the military and chose the path of Theater Control (CP Officer) to monitor the battle and issue instructions. Called "Haruka" by Michiru, Munakata, and Kazama. Called "Haruka" (with special affection) by Mitsuki. Called "Big Sis" by her sister Akane, who switches between formal and casual address depending on the situation.

Member of Special Task Force A-01 (commonly known as the Isumi Valkyries). A survivor of the BETA invasion of Sado Island. Quiet and shy, but has opened her heart to Michiru Isumi. Standing only 146cm tall, she is very petite and has a reserved, timid personality. While carrying the heavy cross of a tragic past, she holds a strong determination to "live for her own future, not for someone else's" and to "protect the base full of memories," throwing herself into the harsh battlefield as a pilot of the Isumi Valkyries. Due to her position as a petite, younger-sister figure, she is called "Sakura" or "Second Lieutenant Usuki" by senior members and peers. Pilots a Shiranui (Isumi Valkyries Specification).