Bucky Barnes

James Buchanan "Bucky" Barnes is a fictional character appearing in American comic books published by Marvel Comics. Originally introduced as a sidekick to Captain America, the character was created by Joe Simon and Jack Kirby and first appeared in Captain America Comics #1 (cover-dated March 1941) (which was published by Marvel's predecessor, Timely Comics) as the original and most well-known incarnation of "Bucky". The character is brought back from supposed death as the brainwashed assassin Winter Soldier (Russian: Зимний Солдат, translit. Zimniy Soldát), and later assumed the role of Captain America when Steve Rogers was presumed to be dead.

Sebastian Stan portrays the character in the Marvel Cinematic Universe films Captain America: The First Avenger (2011), Captain America: The Winter Soldier (2014), Captain America: Civil War (2016), Avengers: Infinity War (2018), and Avengers: Endgame (2019), as well as cameos in Ant-Man (2015) and Black Panther (2018). Stan will return to portray the role in the upcoming Disney+ series, The Falcon and the Winter Soldier (2021).

Iago PUC

 * Bucky Barnes / Winter Soldier is a main character in The Thunderbolts, with Sebastian Stan reprising his role.
 * Bucky (as Winter Soldier) appears in Marvel: All New, All Different Chronicles, voiced by Troy Baker. This version is renamed James "Bucky" Rogers, and is Steve Rogers' biological older brother, and an enhanced soldier who reemerged as a knight with ice abilities after being thought to have been killed in action during World War II, until it was revealed he was in frozen suspended animation and revived and enhanced by the Ice Elves. Along with enhanced strength and speed, Bucky also wields a Asgardian rapier sword made of components from ancient Frost Giant weapons. Despite his long absence, he soon reunited with his brother and resumed to live a life on modern world both as a citizen and a superhero. He is also a teacher and trainer at S.H.I.E.L.D. Academy, and is married with Carol Danvers' sister Sharon, with whom he has two daughters named Barbara (or "Barbie" for short) and Margaret (or “Peggy” for short).
 * Winter Soldier appears in Marvel's The Avenging Spider-Man, voiced by Troy Baker. He is a playable character in the "Cold Claws" DLC story alongside Black Cat and the Punisher.