His Best Friend (Tony Stark)

Brooklyn "Brook" Briar Jackson is the daughter of Everett Jackson, a scientist who worked with Howard Stark and Dr Abraham Erskine to create Captain America out of Steve Rogers.

After WW2, Howard and Everett stayed in touch with each other, each of them going over to the others house to tinker with different experiments.

After both of them getting married, they would spend family vacations with each other. Because of this, Brook and Tony become quick friends.

When her parents were killed in a plane crash, (that she was involved in too), Brook was sent to live with her grandparents in England but after they died and her aunt and uncle were deemed unfit to take care of her and died a few weeks later, Brook was moved back to America and moved in with the Starks.

After Tony's parents die from a car accident, the two become famous together. They were both mentored and conditioned under Obadiah Stane, a close friend of their fathers.

After a couple of years, Brook is running the business side of things of Stark Industries and Tony is still being an irresponsible playboy. What happens after Tony gets captured and rethinks the way that Stark Industries should go?

What could possibly go wrong?