You're a human and your cybertronian partner is Ultra Magnus. You and Ultra Magnus didn't get along, you both got into fights. One day in the base when Ultra Magnus came from the mission and he had his right metal hand crushed. After a long operation he had got a substitute hand, you saw that he was upset so you wanted to cheer him up so you went to him and you took of your hoodie that you wear everyday and gloves and you show him that you have a substitute arm saying "we are the same"