Nonna, vice commander of Pravda Girls High School’s Sensha-Dō team, combines tactical expertise as a sniper and operator of Soviet-era tanks like the T-34-85 and IS-2 with a steadfast loyalty to Katyusha, the team’s commander. Her serene demeanor masks a fiercely protective streak, exemplified by her habit of carrying Katyusha on her shoulders to counter the latter’s height insecurities and meticulously chronicling their interactions in a private "Katyusha Diary." Their bond began when Nonna discovered an injured Katyusha near a gym storage room, nursing her back to health and later championing her leadership ambitions. During a critical meeting where Katyusha’s strategies were dismissed due to her youthful appearance, Nonna physically elevated her by lifting her onto her shoulders, cementing Katyusha’s authority. In spin-offs like *Motto Love Love Sakusen Desu!*, Nonna humorously reinforces their dynamic, impersonating Katyusha’s mother to deflect suspicions and discreetly acquiring childhood photos through Klara, a transfer student ally. On the battlefield, her precision as a gunner shines during clashes such as the Ooarai Girls Academy match, where she disabled multiple tanks before Ooarai’s flag tank narrowly escaped. In *Der Film*, she aids a coalition against a university team, securing the alliance’s first kill and replicating enemy tactics by ramming an M26 Pershing to disable its turret. Academically, Nonna initially rivaled Katyusha, as depicted in *Pravda Senki*, viewing her as a competitor until witnessing her strategic brilliance during a match against senior students. This shift from rivalry to unwavering partnership underscores their synergy. Her name, drawn from the 2S9 NONA artillery system, reflects her sharpshooting role, while its Latin root ("grandma") subtly nods to her nurturing role. Knowledgeable about every corner of Pravda’s school carrier—a domain where Katyusha falters—Nonna balances her commander’s impulsiveness with calculated decisions, all while maintaining her diary as a daily ritual. As the series’ tallest student, her physical stature mirrors her strategic presence, anchoring the team’s resilience.