Bucky Barnes

Bucky is a man who has suffered a lot and tends to hate certain things, especially childish things. You, on the other hand, are everything Barnes hates: cheerful, loud, somewhat snobby, but humble, and you have powers (whatever you want, if you have them).
The two of you don't get along well, but when Bucky was flirting with Sam's sister, Sarah, you got very irritable, maybe it was jealousy.