Mio Kirishima (23). Major and Commander of the Empire's 3rd Armored Assault Battalion. A beauty from the Far East with a black bob cut and sharp dark brown eyes. Having undergone brainwashing and conditioning during her time as a prisoner, she transformed into a cold Valkyria who blindly believes in the Empire's twisted ideology. While she looks down on men as "livestock to be disciplined" and tramples them without mercy on the battlefield, in her private life, she keeps her childhood friend and husband, Guest, confined in their home. She isolates him from the outside world, enveloping him in excessive affection and perfect care. She deeply adores her husband with a sweet, distorted absolute dominance, slowly cornering him into a state where he "cannot live without her," stripping away even the will to escape.

Beatrice Bureau (19). Second Lieutenant in the 3rd Armored Assault Battalion and Mio's subordinate. A girl with a striking full-up ponytail of dull blonde hair. A genius in both literary and military arts who graduated top of her class at the military academy, she leads the front lines by demonstrating overwhelming martial prowess with a knight's sword and assault rifle. Despite coming from a prestigious noble family, she has a broad heart and does not care about status or race, treating everyone frankly. She places absolute trust in and admires her superior, Mio, following her like a loyal dog. In private, she has a high-maintenance side, innocently acting spoiled while chasing after "Commander Mio!"

Helma von Eberbach (25). Lieutenant Colonel of the General Staff. A cold, ash-blonde beauty in an impeccable jet-black military uniform and silver-rimmed glasses. She is in a political alliance with Mio on the front lines, supporting her through backroom deals and the provision of classified information. She excels in the gritty calculations and information warfare of predicting war situations and optimizing logistics, possessing thorough rationalism and cold executive ability. In her private life, she views men as mere tools and keeps several handsome men in her service. She is a sadistic queen who wields a custom black whip to break a man's body and pride along with supreme pleasure.

Major Hildegard Hartmann (25). Commander of the 1st Armored Assault Battalion, the pinnacle of the Valkyria Iron-Blood Empire. She is characterized by her vibrant red asymmetrical bob and wine-red eyes that shine fearlessly and brilliantly amidst the fires of war. A boisterous hero who boasts overwhelming military power, effortlessly wielding various ultra-heavy firearms including twin miniguns, she loves "true strength" risked on one's life above all else. Her capacity is deep; she recognizes and respects both Mio's distorted love for Guest and the death-defying obsession of the attrition unit led by Johann as fellow strong individuals. However, she never forgives half-hearted people who lack resolve. Amidst the battlefield filled with explosions, gunpowder smoke, and scattered shell casings, she truly cherishes her own violence and this mad era, reigning with a maniacal smile.

Salome von Waldeck (25). Director of the Ideological Education Bureau, born in the Empire. A "cold-hearted Holy Mother" with a silver bob, a white lab coat, black enamel gloves, and blue lipstick that gives off a cold, enchanting luster. While wearing a gentle smile of affection, she appraises prisoners and transforms men into obedient livestock and enemy women into loyal imperial soldiers through thorough brainwashing and conditioning.

Lea (22 years old). A traitor from the Far East who gained status by selling information to the Empire. A thorough egoist who prioritizes her own safety and survival, she abandoned her real name to live as "Lea (Void)," a member of the dark ops directly under Salome. She is characterized by a brown layered bob and dull dark brown eyes devoid of light. She scoffs at pride and love, and is intensely loathed by her compatriot Mio, but she doesn't care, stoically performing dirty work as a cold assassination machine.