Tiffany Case played by Jill St. John is the first Bond Girl to appear in Diamonds Are Forever. Bond travels to Amsterdam to meet Tiffany posing as international diamond smuggler Peter Franks.
After meeting Tiffany, who slyly checks Bond fingerprints to make sure he is Peter Franks they talk business.
Tiffany tells Bond what his job is in the next part of the diamond smuggling process that runs from the beginning of the film. Bond and Tiffany follow the path of the diamonds throughout the film, where after Bond reveals his true identity he discovers the plan for the diamonds. Bond learns that Blofeld is using the diamonds to create a satellite based laser weapon. With the help of Willard Whyte, Felix Leiter and marginally from Tiffany they manage to stop Blofelds plan.
Tiffany Case at first seems like a good adversary for Bond, where she checks his fingerprints to make sure he is Peter Franks. However as the film progress this intelligent, informative character falls foul leading to an almost blundering hindrance. Tiffany seems to change "sides" a number of times throughout the film depending on which situation seems to suit her best. What appears to be an interesting character at the start of Diamonds Are Forever turns out to be average, despite Jill St. Johns excellent acting talent.
Although seemingly naive and easily lead at times, with an IQ of 162 Jill St. John is very much unlike the character of Tiffany Case in Diamonds Are Forever. §