The Balancer

Before the members of Fairy Tail were stopped in time by Aconolgia Mavis Vermillion told Lucy about how here mother had kept peace between dragons and humans. But since Layla had died it was now Lucy's responsibility. Zeref had awakened and she had to save her nakama from the dragon king. Lucy had to save the world and in order to do that she had to become Aconolgia's apprentice.