Philippe d'Orléans

Duke of Orleans and brother of Louis XIV, making him Louis XV's uncle. At one time in the anime he calls Louis as inferior to his father, though the king retorts with a joke instead. Marquise de Pompadour once said that Orleans can make the people of France love him, but he himself does not understand them. This character is loosely based on Philippe II, Duke of Orléans. (source: Wikipedia)