Mathilde’s wealthy friend. Madame Forestier treats Mathilde kindly, but Mathilde is bitterly jealous of Madame Forestier’s wealth, and the kindness pains her. Madame Forestier lends Mathilde the necklace for the party and does not inspect it when Mathilde returns it. She is horrified to realize that Mathilde has wasted her life trying to pay for a replacement necklace, when the original necklace had actually been worth nothing.