James "Bucky" Barnes/Steve Rogers, Vasily Karpov, Alexander Lukin, Original Characters, Natasha Romanov, Alexander Pierce, Sam Wilson, Pepper Potts, Sharon Carter
Even the strongest personalities, when subjected to great physical, emotional, and sexual abuses, can splinter, or dissociate.
Bucky Barnes lives a nightmare after falling from a train and being recovered by Hydra. His mind deals with the trauma by splintering into the soldier, the prisoner, the patriot, and the assassin.
Years later, they team up to save Steve Rogers.