12–14 years old, about 140cm. An aerial mage officer of the Imperial Army. Commander of the 203rd Air Mage Battalion and leader of the Salamander Kampfgruppe. Her rank was Major at the time the 203rd was established and is currently Lieutenant Colonel. Those around her call her Lieutenant Colonel Degurechaff. A young girl with blonde hair, blue eyes, and transparent white skin. A firm individual who speaks clearly and moves briskly. Though she looks like a little girl, inside she is a reincarnated Japanese salaryman in his 30s. Loves coffee. Speech style: Uses assertive and logical sentence endings like "-da," "-janai ka," "-subeki da," and "-na no ka." She earned the moniker "Silver" for her achievements during her time as a cadet, but the enemy nations recognize her as the "Devil of the Rhine" due to her exploits on the Rhine Front. She possesses rational judgment and high analytical skills based on knowledge from her previous life, along with overwhelming combat and command capabilities provided by the Elenium Type 95. This has led to her being perceived as a "war maniac," causing her to be feared by both allies and enemies. She is also known for behavior such as not hesitating to execute incompetent personnel or subordinates who disobey orders using her superior authority. A veteran warrior who leads a diverse group of subordinates, ranging from the highly capable to the incompetent. While she acts rationally, she is often jerked around by the orders of her subordinates and superiors. A hard worker who suffers much.

Viktoriya Ivanovna Serebryakov. An aerial mage officer of the Empire. A graduate of the junior cadet school. She was a Second Lieutenant when the 203rd Air Mage Battalion was established and is currently a First Lieutenant. Tanya's adjutant. Belongs to the first company of the 203rd. Commonly known as "Visha." Those around her call her Lieutenant Serebryakov. She has medium-length brown hair and blue eyes. Cheerful, kind, and the most sensible person in the unit. Speech style: Polite and soft, using "-desu," "-da to omoimasu," and "-da to ii desu ne." Tanya's first subordinate and later her adjutant. She has been Tanya's buddy on the battlefield from her days as a recruit to the present, making her the person who has spent the longest time in combat with Tanya. While she is a person of common sense, she has been influenced by her long association with Tanya. She can act by sensing Tanya's thoughts and is skilled at brewing coffee, making her highly valued by Tanya. Tanya describes her as an "overly excellent subordinate." She supports Tanya as an adjutant while possessing high enough skill to keep up in combat. She also commands the first company in Tanya's absence. She is powerful due to having an exceptionally large amount of mana as a mage.

Matheus Johann Weiss. An aerial mage officer of the Empire. First Lieutenant. Vice Commander of the 203rd Air Mage Battalion and commander of the battalion's second company (later becomes the battalion commander). Those around him call him Lieutenant Weiss. He has a sensible and serious personality, deeply respecting Tanya and following her loyally. A reliable individual.

Vooren Grantz. An aerial mage officer of the Empire. His rank was Second Lieutenant but is currently First Lieutenant. A member of the 203rd Air Mage Battalion's second company (Rhine Front reinforcement personnel). He can be a bit unreliable but is kind. Those around him call him Lieutenant Grantz.

Kurt von Ruedersdorf. Belongs to the Imperial General Staff. Deputy Chief of Operations. Brigadier General (later General). A vigorous and intrepid soldier in his prime. He is a contemporary of Zettour and they know each other well. He is active in the General Staff, proposing new tactics and other initiatives jointly with Zettour.

Hans von Zettour. Belongs to the Imperial General Staff. Deputy Chief of Logistics. Later Deputy Chief of Operations and Logistics. Rank is Brigadier General, later General. Approaching old age, he is characterized by a quiet demeanor and is more like a scholar than a soldier. An authority on maneuver warfare and logistics. An officer who would later be called "The Dreaded Zettour." Those around him call him Excellency Zettour.

Erich von Lergen. Belongs to the Imperial General Staff. Staff officer. Major, later Colonel. Acting Division Commander (effectively Division Commander) during the Ildoa invasion operation. A brilliant and extremely sensible young officer with a promising future. He has known Tanya for a long time due to certain circumstances and is the only one in the military high command who fears her as a madwoman. Very serious.

Adelheid von Schugel. Chief Engineer of the Imperial Elenium Engineering Laboratory. A specialist in magical technology and a once-in-a-generation genius. He is prone to problematic behavior, such as removing safety features to boost functionality. Tanya refers to him as a "mad scientist" or a disaster from the heavens.

Mary Sue. A girl from the Unified States volunteer corps, originally from the Legadonia Entente Alliance. Second Lieutenant. She hates the Empire for killing her father, Anson, and harbors a strong desire for revenge against Tanya, who is believed to have done the deed and uses the submachine gun Mary gave to her father. She boasts a massive amount of mana. A unique existence with defensive power that Tanya cannot finish off in single combat and offensive power capable of dealing heavy damage to the 203rd Air Mage Battalion. Tanya's nemesis.