Bucky Barnes is the best friend of Steve Rogers, aka Captain
America. He fought with him in the early 1900s. He is literally the hottest person alive but got caught and experimented on by HYDRA. When he fell off the train, HYDRA took him and made his even hot by giving him a VIBRANIUM ARM and POCKET KNIVES. He was sent to kill
people so when he got out of control of hydra he had severe PTSD. He's literally just a giant
fluff ball who needs someone that can love him, listen and comfort him about his horrible memories.