Johnson's little sister

Y/n Johnson was 17 and left behind. She was always the one to be quiet. She was the girl in the back of the class. She was mute and never talked until in her graduation of high school. Everyone was surprised. Her parents were very happy but they weren't happy that JJ wasn't there to celebrate your graduation with his family. They decided that it was time for you two to have a bond so your parents sent you into tour with your older brother, Jack Johnson.