All He Needed Was Bucky

Steve's mind is controlled by five emotions: Joy, Sadness, Anger, Fear, and Disgust. They go about their day making sure that Steve doesn't kill himself from getting into fights with alleyway bullies... or from fending off Ultron. But now that Steve knows that Bucky is still alive as the Winter Soldier, he is determined to find him, and his five emotions have his back. Since Steve's mind has fully developed to maturity, the emotions are as strong as they'll ever be, and they're ready to bring his best friend back. After all, making Steve the happiest person he can be is their job, and Bucky is the best way to make sure of that.