You’re Steve’s little sister, and his bestfriend is Bucky, Who you have a secret relationship with. Also you’re a shape shifter (a black panther)

One night you were stalking around hogwarts as your panther form. You get up on the roof and you see Bucky there looking at the city while smoking. You approach and rub your head against him. He recognizes you immediately and throws his cigarette away. ”Hey beautiful,” He says well petting you.