Kathryn Merteuil is a fictional character from the Cruel Intentions franchise, created for it by Roger Kumble based on the Marquise Isabelle de Merteuil from Pierre Choderlos de Laclos's 1782 novel Les Liaisons dangereuses. From Wikipedia
The TV adaptation of the 1999 film and 1782 novel brings new characters and dynamics to a modern collegiate setting.
