Maeda Mayu
Graceful and elegant Mayu works as a maid in a cafe downtown, but is really a Yakuza princess in disguise. She would rather live a normal life if given a choice, but isn't hesitant to use her influence if push comes to shove.
Nanajuu
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To see her alt mode, make her gain enough dislike/hate for another card in your class. She should switch to her alt mode the next day, and stay in it until the card she hates is expelled/eliminated from the class.