Mishina is a student of Qing-Takeda's Jueluo Academy who now studies in Musashi Ariadust Academy and is staying in the Musashi with her grandfather. Despite her petite appearance, she is an expert in machineries, and is responsible for the swift repair and upgrades done to the Jizurisuzaku. It is revealed that she is a junior of Naomasa, and she is a machine otaku.