Who is Diane, Duchess of Tremontaine from Swordspoint: A Novel and what is their importance? Swordspoint English & Literature "Diane

The Duchess of Tremontaine is a master of secrecy and deception. She is a beautiful, delicate woman, always wearing exquisite clothes, and surrounded by lovely furnishings. The Duchess appears to be concerned only with the things of high society, from gossip, to clothing, to fine foods, and how to throw the best party. When she rides in her swan-shaped summer barge, everyone in the city cranes their neck to see how glamorous she looks, like a fairy queen.