Momo Kawashima acts as loader for the Turtle Team and Public Relations Manager in Ooarai Girls Academy's student council. Her family runs a stationery store in Mito, Ibaraki Prefecture, and she has five younger siblings, leading to financial strain. Though outwardly composed and strict, her anxiety and volatile temper emerge during Sensha-dō matches and high-pressure scenarios, sometimes triggering aggressive outbursts or panic. This intensity originates from her knowledge that Ooarai faces permanent closure unless its Sensha-dō team wins the national championship—a fact she disclosed during the Pravda match truce. Her devotion to saving the school drives rigorous strategy development and combat focus. Initially serving as gunner, her agitation caused notoriously poor aim, often neglecting precise targeting. She relinquished the gunner role to Anzu Kadotani during the semi-final against Pravda, fully transitioning to loader. Her marksmanship later improved marginally, with one confirmed hit on a St. Gloriana Crusader tank in Der Film, missing its intended target by 25 meters. Chronologically earlier, she scored a point-blank hit on a Maginot Girls' Academy R35 tank during a practice match in a spin-off manga. After Ooarai's tournament victory, she broke down in tearful relief while thanking Miho Nishizumi. A rare softer side exists, evidenced by a photographed smile and brief happiness during a camping trip, though she vehemently denies such expressions when teased by Yuzu Koyama. In Das Finale, her academic performance declines due to efforts to secure another tank for the team. Appointed overall Sensha-dō commander, success in this role could secure her a university scholarship. This period also revealed her compassionate intervention preventing the expulsion of students who later formed the Shark Team. Outside Sensha-dō, she demonstrates ballet proficiency, executing a 32-revolution pirouette. Her leadership extends to unconventional situations, as seen when captured by Anzio Girls High School in Motto Love Love Sakusen Desu; she rapidly ascended their chain of command, briefly leading them as "Momochovy." Her birthday historically coincides with the 1945 Prague Uprising and Battle for Castle Itter.