when we met

You're JN Stark, the daughter of Tony and Pepper. Actually your real name is Josie, short for Josephine, Nova Stark but even before you were born your parents decided to call you JN. You're 17 years old and you've lived with the other Avengers and your two cats Sam and Dean in the Avengers Tower nearly for your whole life.
But you've spent the last few years exclusively in Germany because of one of your father's missions and have now moved back to New York with your parents.
You get along well with nearly everyone, only one gives you trouble of any kind.
Old wounds that you thought would have healed long ago torn open again forcibly by him.
And then there's this new guy who joins the Avengers and always wears that hilarious red jumpsuit. Of course he has to look outrageously good in that.
Your emotions are taking a roller coaster ride but soon you'll have to make good and bad decisions between the people who know you like no one else... and you're going to lose one of them.