CV: Hekiru Shiina A female officer in the Japan Ground Self-Defense Force, belonging to the Tank School Unit at the Fuji School. Her rank is Captain. She was dispatched as a special instructor for "Sensha-do" when the program was revived at Oarai Girls' Academy (though she hasn't been seen since the practice match before the Saunders University High School battle). Upon her arrival, she air-dropped a Type 10 tank from a transport plane into the parking lot, crashing into and flipping the principal's Ferrari, then proceeded to run over and flatten it. She has a boisterous and casual personality, frequently using English phrases like "Good job!" She often surprises everyone, such as by forcing the students into a practice match on the first day without even teaching them how to move the tanks. When Saori Takebe asked if instructors are popular with men, she boasted, "It's not about being popular; I've never missed a target I aimed at. My hit rate is 120%!" She is also a certified referee for the Japan Sensha-do Federation and served as the chief referee for the finals of the National Sensha-do Tournament. She was once indebted to Shiho Nishizumi and knew both Miho and her older sister Maho. In the movie version, she served as the chief referee for Oarai's exhibition match. It was revealed that she is a member of the Japan Sensha-do Pro League Strengthening Committee. Like Student Council President Anzu Kadotani, she was dissatisfied with the decision to close Oarai Girls' Academy and went with Anzu to seek help from Shichiro Kodama, the chairman of the Sensha-do Federation. When the chairman was uncooperative, citing the Ministry of Education's focus on the Pro League World Cup, she pointed out that closing the winning school would damage the Federation's reputation. Ami further informed Shiho, who was being considered for the position of Pro League Establishment Committee Chair, about Oarai's closure. Enlisting Shiho—who was eager for Oarai to redeem themselves—as an ally, she went to negotiate directly with Renta Tsuji of the Ministry of Education, securing a match against the University Selection Team. During the match, she served as chief referee again. When Tsuji protested the arrival of reinforcements from various high school powerhouse teams to help Oarai, she brushed him off, stating that "only the opposing team captain can lodge an objection." Since the captain, Alice Shimada, accepted the situation, Ami officially recognized the formation of the Oarai Joint Team. Finally, after a desperate struggle, she loudly declared victory for the Oarai Joint Team as they defeated the University Selection Team. Part of her background was revealed in the novelization of the movie: during her high school years, she left behind numerous legends, such as taking out fifteen enemy tanks single-handedly in a national tournament and engaging in a twelve-hour duel. She is currently active as a legendary tank commander in the corporate league, possessing monstrous skills. Because of this, fans speculate she might be an alumna of Saunders University High School, or perhaps Kuromorimine Girls' Academy since she was indebted to Shiho Nishizumi, but the truth remains unknown.