Applejack loves Apple Bloom and promised her she wouldn't let anything happen to her. Even when two bullies at school tease her for not having her cutie mark. One day they would go too far and Applejack would tell Apple Bloom about the day she was born and the promise Applejack made for her when she was a newborn baby. Applejack never broke a promise in her life. Not even the one she made for her little sister.