Tanya Degurechaff, once a Japanese salaryman with a ruthlessly utilitarian worldview, met a violent end when a vengeful subordinate pushed him into an oncoming train. Confronted by the divine entity Being X in death, he rejected its demands for faith, sparking a philosophical clash that culminated in reincarnation. Transformed into a blonde, blue-eyed orphan girl within an alternate early-20th-century world mirroring Imperial Germany, Tanya’s new existence began under the care of a rural nunnery. Her early demonstration of extraordinary magical aptitude led to military conscription at age eight, intended to secure a secure administrative post through meritocratic achievement. Instead, tactical ingenuity and uncompromising efficiency propelled her to frontline command. By nine, she attained the rank of Second Lieutenant, later ascending to Major and leading the elite 203rd Aerial Mage Battalion through high-casualty operations. Tanya approaches warfare with machine-like rationality, treating personnel as variables in strategic equations while leveraging regulations to mask disdain for inefficient superiors. A master manipulator, she weaponizes her childlike appearance to disarm opponents and authority figures alike. This sociopathic pragmatism extends to operations such as the Arene City bombardment, where civilian casualties were dismissed as operational necessities. Her ideology merges libertarian resistance to tyranny with a self-preserving embrace of military hierarchy. A bitter rivalry with Being X defines her existence: the entity’s tampering forced reliance on the Elenium Type 95 computation jewel, a prayer-activated artifact enhancing her magic at the cost of mental coherence. Each use erases memories of its berserker-like effects, intertwining tactical supremacy with psychological fragility. Notable campaigns—the Norden Intervention, Dacian Blitzkrieg, and Eastern Front sieges—showcase innovations like nocturnal aerial bombardments and terror tactics, earning her the epithet “Devil of the Rhine.” Though craving a tranquil life, battlefield triumphs cemented her status as the Empire’s propaganda centerpiece, inadvertently fueling war escalation. Malnutrition stunted her growth, creating a jarring juxtaposition between her delicate frame and lethal reputation. Standard-issue uniforms, accented by crimson collars and Silver Wings Assault Badges, underscore her rank. Flight-capable magic and explosive spellcraft amplify combat lethality, yet dependence on the unstable Type 95 remains a critical weakness. Later commands include the experimental Salamander Kampfgruppe, deploying hybrid forces against adversaries like Mary Sue, a vengeance-driven zealot. Southern Continent skirmishes and Eastern Front attrition warfare highlight her adaptability, though operational victories frequently strain political alliances, deepening the Empire’s entanglements.