Rin gets roped into helping out Machiko Nagata (Nana Mori), an excitable third year student running for student council president. Mudako turns Nagata into the Akiramest, Monkuarukaicho. Rin uses the Big Aquamarine to amplify her voice and defeat her, recovering the Invisible Ametrine. Nagata loses to Teruki, but she remains passionate about helping out the school.