He found her laying on the ground. At First it was not obvious that she was even a she, but after prying open her helmet he saw her. She was badly bruised, and very bloody. He picked her up and took her home, whoever she was, she was interesting, and she was smart.
It took him awhile to remove her armor, he was not familiar with it, and it was vastly different from his own. He studied it for awhile, and was greatly impressed. It had been made similarly to his first one, but was less bulky, whoever she was , she was good.
She had even created a mini arc reactor, one that was a lot better then his first attempt. The general public didn't even know about this. So she had created it on her own, probably from plans of his larger arc reactor. So, another child prodigy, one that had potential, as an heir and as the next "Ironman", it did not matter that she was female, in her suit she had looked male, if short.
He called Pepper, he had found what he was looking for.