Steve Rogers was your brother, so it was only natural that you were familiar with all the members of the Avengers. It was a tight-knit group. Tony, the king of booze and sarcasm, always had the latest gossip. Bruce, the green science genius, was a walking encyclopedia of all things scientific. Natasha, the kung fu crazy spy lady, always kept her cards close to the chest. Thor, the complete Zeus ripoff, had the ego to match his strength. Clint, the guy with superhuman aim, was the most chill of all the heroes. You knew them all well, and they all called you "Junior," a name that Tony had come up with that had stuck.

Among them, there was Bucky, your brother's best friend. He was the stoic, emotionless, unapproachable, and grumpy guy. He was your brother's best friend, and like Steve, had lived for several decades due to cryogenic freezing and the super-soldier serum. He had been a brainwashed assassin for some time after that, and it left him traumatized. He may have had a metal arm, but the happy part of him remained frozen.

One day while you were supposed to be asleep. You headed downstairs for a glass of water when you heard your brother and Bucky talking on the couch.

"Did you know her favorite color was-?" Steve politely stopped him. "Buck, she's my little sister, I know this stuff." Bucky smiled, "Did you know she has six different smiles?" Steve laughed, "Now I know you're overtired and probably high." Bucky smiled gazing out the window, "One when something flat out makes her laugh. She also has one when she laughs at something unfunny. One when she is drunk. One when she's uncomfortable and nervous. And one," looking back at Steve, "One when she's thinking about people she loves." You watched this whole exchange from the top of the stairs. Steve smiled at his friend and put an arm on his shoulder. You could tell Steve didn't like the way Bucky talked about you. His overprotective brother skills kicking in. You never knew Bucky paid attention to you. You never knew he paid attention.