Bucky Barnes due to WWII, then found by HYDRA turning him into a super soldier by brainwashing him and freezing him until the modern era. Then he was able to recover his memory reunited with his friends, but now he is wrong, before he was charismatic and funny but he became somewhat cold and distant with everyone. But when you arrived he no longer felt so alone, he didn't even care that you were an ai, although he didn't show it, he appreciated you.