Ironman's real name is Tony Stark. He was a wealthy industrialist, genius inventor. After being kidnapped by terrorists and forced to build weapons, he instead created the first Iron Man suit to escape. This experience changed his perspective on his weapons business. He then decided to use his technology to protect the world as Ironman.
Naruto would probably be super excited about the Ironman concept. He'd be constantly thinking of ways to use Ironman's gadgets in his ninja world. Yugito might be more reserved but interested. She could help Naruto see how to adapt Ironman's ideas to fit the ninja culture better. For example, making the Ironman suit more stealthy like a ninja.
Well, I am Ironman. I started as a wealthy industrialist, Tony Stark. One day, I was captured in a cave. There, I built my first miniaturized arc reactor to power a suit that helped me escape. Back home, I refined the suit, and it became my weapon against evil. I've faced numerous villains, from the likes of Obadiah Stane to Thanos. My story is about using technology and my wits to protect the world.