Arya knew that she would inherit Stark Industries one day. Her Uncle Tony had made that very clear when he got back from Afghanistan, his second announcement after the cancellation of weapons manufacturing. After that everybody seemed to forget that she was Arya Horseface.
She learned quickly that people would try to use her for her name and her new role as heir to SI, a harsh lesson for a girl of ten. Arya was glad that she wasn't as trusting as Sansa. That and she was now going to, as Theon called it, "smart people boarding school" in D.C.He wasn't wrong, everybody knew Harrenhall only excepted the best and brightest from around the world. It was the first time since she was first learning the alphabet that something in school was challenging her, and she loved it. For the first time in a long time her life was going great.
Then, all hell broke loose, but Arya could make friends (or at least grumbling allies) with all sorts of people.