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The Demon King (魔王; Maō), also translated as Demon Queen or Maou, is the main female protagonist and the 43rd Demon King, the epithet "Ruby Eyes," the supreme ruler of the Demon Realm. After teaming up with the Hero, she disguises herself as a human noblewoman known as the Crimson Scholar (紅の学士; Kurenai no Gakushi) and shares her vast knowledge on such topics as economics and farming. She comes from the Library Clan, a clan of demons that prioritize knowledge. They reside in a hidden dimension c

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