This is a reader insert. Y/N Stark is Howard Stark's adoptive sister. Her adoptive parents found her in the middle of a dark alleyway, where she had been abandoned as a baby. I'm not going to spoil the plot so that's about as much as I can tell you. BTW Movie SPOILER ALERT!!! Contains spoilers from many Marvel movies, so read at your own risk. # 1 in the category 40s (at some point) :)