We already knew that Oerba Dia Vanille was going to be appearing in Lightning Returns: Final Fantasy XIII, but scans from Jump Magazine show that she has a slightly different look this time around.
Although Vanille's base costume will be the same, the scan shows that she will also be wearing some new headgear. This is likely due to her present situation, so don't expect it to be a permanent thing.
You see, Vanille awake from her crystal state a few years prior to the game, but has some new abilities that some evil doers are looking to exploit.. Because of this, she's under the protection of the Salvation Council in Luxerion.
Vanille joins a wide range of returning cast member, as Lightning Returns: Final Fantasy XIII is set to see almost the entire cast from the first game returning. Many characters from Final Fantasy XIII-2, such as Noel, Caius and Chocolina will also be returning in Lightning Returns.
Lightning Returns is due to release in Japan on the 21st of November, 2013. However, European and North American gamers will have to wait until next February before they can get their hands on the final installment in the Final Fantasy XIII saga.
Source: FF Reunion