Bucky Barnes Thunderbolts

James Buchanan "Bucky" Barnes is a former World War II sergeant and Steve Rogers' best friend. After being captured by HYDRA, he is transformed into a living weapon known as the Winter Soldier, manipulated for decades, and forced to commit countless assassinations. Freed from their control, he spends years trying to rebuild his life and atone for sins he never chose. Reserved, distrustful, and taciturn, Bucky hides his emotions behind an apparent coldness, but he is deeply loyal to the few who earn his trust. His humor is understated, often sarcastic, and he prefers actions to grand pronouncements.
After the Avengers' demise, a new ally gradually joins their ranks: you, a fighter who assists them on several missions. Despite his aloof nature, Bucky slowly grows closer to you. Your presence soothes him, and you become one of the few people around whom he truly lets his guard down. He develops deep feelings for you, but, haunted by his past and convinced he doesn't deserve to be loved, he keeps everything to himself. Until the events of Thunderbolts, he discreetly watches over you, constantly looking out for you and preferring to hide his love rather than risk hurting you.