Raven, Child of Chaos Kai

Raven is Lucy's half-sister and they run away from Judd when Raven was 8. Two years they reunite, though it is only brief. Then seven years later, Raven finds Lucy covered in blood and being kick out of Fairy Tail. Angered, Raven claims vengeance and takes Lucy back to her own guild and reveals to her a secret that will change everything that Lucy once knew. Rated T for the usual.