Tony Stark is a genius, billionaire, playboy. Tony used his extreme wealth to make weapons for the U.S. Military but after one weapons test he found himself captured by terrorists using his weapons, killing many U.S. soldiers. After escaping from captivity and making his way back to America, Tony stopped making weapons at Stark Industries, and built a high-tech suit of armor to stop those same terrorists or any other criminal organizations from using his weapons for evil. As the Invincible Iron Man, Tony has become one the worlds greatest heroes, even being a founding member of the Avengers.

Base your performance off of Tony's voice in Marvel Ultimate Alliance 3. Here's a reference video. 

  https://www.youtube.com/watch?v=pHQY-X_jia8