skye | nat.
The Winter Soldier. During the war, Bucky fell off a train and everyone thought he was dead. When in actuality Hydra had taken him, brainwashed him, experimented on him and turned him into a ghost. He's the man Hydra sent to wipe out Fury just before Shield's demise. I'm not sure how much he remembers about being Bucky but he's not under their control anymore.