Anthony Edward "Tony" Stark (Played by Robert Downey Jr.):
A billionaire playboy, industrialist and ingenious engineer, Tony Stark suffers a severe chest injury during a kidnapping in which his captors attempt to force him to build a weapon of mass destruction. He instead creates a powered suit of armor to save his life and escape captivity. He later uses the suit to protect the world as Iron Man. Through his corporation ― Stark Industries ― Tony has created many military weapons, some of which, along with other technological devices of his making, have been integrated into his suit, helping him fight crime. Initially, Iron Man was a vehicle for Stan Lee to explore Cold War themes, particularly the role of American technology and business in the fight against communism. Subsequent re-imaginings of Iron Man have transitioned from Cold War themes to contemporary concerns, such as corporate crime and terrorism.
Lt. Colonel James "Rhodey" Rhodes (Played by Terrence Howard Don Cheadle):
War Machine (James Rupert "Rhodey" Rhodes) is a fictional character, a comic book superhero appearing in comic books set in the Marvel Comics universe. The character of James Rhodes first appeared in Iron Man #118 (January 1979) by David Mic David Michelinie, John Byrne, and Bob Layton. The War Machine armor, which became Rhodes' signature armored battlesuit, was designed by Len Kaminski and Kevin Hopgood.
Virginia "Pepper" Potts (Played by Gwyneth Paltrow):
Pepper, originally in the secretarial pool, gets her job by fixing an accounting mistake made by Stark himself. Pepper is originally infatuated with Tony and responds to the attentions of Stark's chauffeur and assistant Happy Hogan with caustic remarks. This, almost immediately after her first appearance, coupled with Stark's growing affection for her, puts her in a love triangle between Stark and Hogan. Pepper is for a time interested in Iron Man, unaware that he and Stark are the same person. However, she eventually falls in love with and marries Hogan, eloping with him in Tales of Suspense #91, though that relationship is not without its troubles.
Obadiah Stane
The Iron Monger is an identity used by several fictional supervillains published by Marvel Comics. The first and most notable person to take up the identity is Obadiah Stane. He first appeared in Iron Man#200 (November 1985), and was created by Dennis O'Neil and Luke McDonnell. Obadiah Stane becomes the president and CEO of his own company (Stane International) as a munitions dealer. He also goes into business with Howard Stark. After Stark and hi wife died in a car accident, Stane turns his sights on acquiring control of Stark International, the industrial corporation he had worked with, now owned by Tony Stark(the son of Howard Stark). Stane has his agents, the Chessmen, attack Stark Industries and assault James Rhodes, a confidant of Tony
Mandarin
The Mandarin is a fictional character, a supervillain who appears in comic books published by Marvel Comics. He is the archenemy of Iron Man. The Mandarin is a superb athlete with tremendous skill in the various martial arts. Through repeated practice, he has toughened all the striking surfaces of his body, especially his hands, which are covered with thick calluses. He can even split Iron Man's magnetic-beam reinforced alloy armor with repeated blows. So great is the Mandarin's martial arts ability, that he can even survive years without food and water, apparently sustaining himself purely via his mastery of chi. The precise degree of The Mandarin's martial art powers has been the subject of multiple implied retcons by Marvel Comics. Initially, Mandarin was portrayed as being such a superhumanly skilled martial artist that he could destroy Iron Man's armor with his bare hands. Later portrayals focused on his use of the rings, and implicitly retconned the Mandarin's skill to being great but no longer superhuman. The most recent continuity has restored Mandarin's martial arts ability to its original superhuman level. The principal personal weapons of the Mandarin are the ten rings which he wears on the fingers of each hand. The rings' operations cannot be explained by contemporary Earth science, but it is known that they served as near-limitless power sources for the warp-drive engines of the Makluan starship of Axonn-Karr. The Mandarin learned how to convert the rings to his personal uses and to make them respond to his mental commands. The fingers on which he wears each ring, and the known functions for which he uses each ring, are given below.