Academic Kerstin Jütting describes Leiter as 'a cool and quiet no-nonsense character who knows 007's strengths and weaknesses well'.
Fleming named the character after two of his American friends: 'Felix' was Ivar Bryce's middle name, whilst Tommy Leiter was a mutual friend. Marine Corps who was working with the Joint Intelligence Staff of NATO.
Originally from Texas, he is introduced in Casino Royale as being thin, tall, about thirty-five years old and a former member of the U.S. Felix Leiter is James Bond's CIA ally and friend, played a part in six of the Ian Fleming novels.