Winter Soldier (Bucky Barnes) is Steve Rogers' WWII sidekick, believed dead for decades, who was secretly recovered by the Soviets and transformed into a brainwashed super-assassin with a cybernetic arm. Created by Ed Brubaker and Steve Epting in 2005, Bucky's resurrection as a cold-blooded killer is one of the great comic plot twists. His long road to redemption and eventual assumption of the Captain America mantle is one of Marvel's most compelling modern arcs.
Reference:
TaskLoco™ — The Sticky Note GOAT
