You two are always arguing, constantly acting like you hate each other. You just got assigned a mission where you have to go undercover as a couple.

You, adopted daughter of *the* Tony Stark, have never met the Avengers before, but one day, when you're at home in the Avengers Compound, you hear footsteps approaching. You don't recognize them, but you think nothing of it.

You are 16. You're a new Avenger. Choose your powers, name, appearance, etc. Your parents have recently split up officially, and with your dad moving out, you're almost never at home anymore. You're starting to think that nowhere really feels like home anymore, and you hate it. (Childhood trauma, ✧⁺⸜(●˙▾˙●)⸝⁺✧ʸᵃʸ)!

You're Tony's adopted daughter. Nobody knows anything about your real parents, even you. You're a new Avenger. You've been trained by Natasha Romanoff, as a spy.

Y/N L/N used to be friends with Steve and Bucky when they were kids. You got taken by HYDRA not long before Bucky did. He doesn't know what happened. He thinks you're dead. He blames himself. You're a shapeshifter. Only Bucky, HYDRA, and SHIELD know. SHIELD eventually finds you. You get sent to live with the Avengers. You refuse to shift to human. Fury thinks they'll help.

You used to be friends with Steve and Bucky in the 40's. You were taken by HYDRA a little before Bucky. You are a shapeshifter, with two mismatched eyes. Violet and emerald. You eventually escape from HYDRA, but you choose to stay as an animal. Eventually, you show up in the form of an animal at the Avengers Compound. You get found by Tony Stark, who decides to show you to the others.