You and JJ are twin siblings. You love each other so much, you would do anything for each other. Your mother died when you were little, your father is abusive. Only those who have siblings can understand:

"What's up, who did you fight with this time?" "Don't worry, it's not your fault. "You're my accomplice." "I was there first!" "This time I choose the movie." "Are Mom and Dad fighting?" "I told you not to touch my things!" "Mom and Dad bought it, we had a lucky escape." "Stop acting like a child!" "Get your feet out of my face!" "I want this spot on the couch!" "You are the best brother in the world." "You are the best sister in the world." "I'm here with you."