YN stark was kidnapped from tony when she was only 6. She was made the most ruthless and most feared assasin in history. Known as the black whistle, she killed worse and more brutal then the winter soldier ever did. He only found her 12 years later and got her back home where she belonged. Now in the compound with the other hero's and ex assasins, not in the wrath of hydra anymore, shes mostly isolating her in her new room. Not really knowing what to do with herself.