Miho Nishizumi, heir to the revered Nishizumi family’s Sensha-dō legacy, began her journey at Kuromorimine Girls' Academy under the shadow of her elder sister Maho. A defining moment came during a national championship when Miho defied her role as flag tank commander to rescue drowning teammates from a submerged Panzer III—a choice that cost Kuromorimine its decade-long championship reign and ignited her mother Shiho’s scorn for valuing solidarity over victory. Exiled by her family’s disdain, Miho fled to Ooarai Girls' Academy, a school devoid of tankery traditions. Ooarai’s sudden revival of Sensha-dō to prevent closure thrust Miho into reluctant leadership. Gradually, she rekindled her love for the sport, championing adaptable strategies and team cohesion over her family’s unyielding doctrines. Her empathetic command earned admiration across rival schools, climaxing in Ooarai’s underdog triumph against Kuromorimine in the national finals, where she outmaneuvered Maho in a tense tank duel. Facing the elite All-Stars University Team, Miho allied with Maho and Kuromorimine’s forces, orchestrating bold tactics to neutralize threats like the colossal Karl-Gerät mortar. Her knack for uniting disparate squads turned the tide in sprawling battles, proving her strategic brilliance. Beyond the battlefield, Miho’s shy demeanor hid steely resolve. She mediated squad disputes, starred in promotional dance videos, and often fumbled daily chores—a contrast to her battlefield poise. Childhood memories unveiled her early defiance of rigid traditions, such as arranging a match to mend Maho’s fractured friendship with peer Emi Nakasuga. Though estranged from Shiho, Miho’s bond with Maho deepened into mutual respect, with Maho covertly endorsing her sister’s unorthodox path. Post-victory, Miho balanced mentoring Ooarai’s recruits with securing scholarships, ensuring the team’s survival. Spin-offs expanded her lore, depicting youthful efforts to reconcile peers and initial disillusionment with her family’s cutthroat methods. Later tales showcased her crusade for inclusive Sensha-dō, bridging rival schools and legitimizing unconventional tactics through camaraderie.