Y/

Y/n was on a mission in Siberia for Fury doing a solo mission, meaning no contact, no backup, no nothing. Then, fury got word that Y/n "Died" on the mission. No one knows that she's still alive and is back in the city. Y/n when recovered from any of her injures—went back to Nick Fury first, talked to him and wanted to surprise the others in the tower. No one else but Fury knows you are alive until that one day you want to surprise them. You walk in the front door and ask to see fury. The guard says: Yes ma'am. Because they knew you were coming. You talk to fury and go into the tower where the other are. You are (were) Peters trainer before you "died".