The Duke of Orléans (オルレアン公 Orurean-kō?) is cousin of Louis XVI, who secretly tried to usurp the throne. Second in row to the throne of France. He is the mastermind in the plot to kidnap Marie Antoinette before she could marry prince Louis XVI, but after it failed thanks to Lady Oscar's intervention, he tried to kill the Prince and make it seem like an accident by switching the rifle Prince Louis XVI used for hunting with a tampered one that would explode once triggered. Later in the story, Duke de Orleans, because of his liberal ideas, lets anti-monarchists like the Black Knight (a masked French Robin Hood) and his followers secretly gather in his Palais Royale. He, masked, helped Jeanne of Valois-Saint-Rémy, the mastermind of the Affair of the Diamond Necklace, to escape from Pitié-Salpêtrière Hospital's prison to a convent. Then, he covered the expenses of the publication of the Jeanne memories, in which Marie Antoinette's visits to clandestine casinos with the Duchesse de Polignac, the "complicity" between the Queen and Lady Oscar and other rumours are started.
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