Is the person standing infront of the Bacta Tank in the Star Wars Rogue One Trailer Jyn Erso who is a Mara Jade type character from Legends. We see her at the end of the trailer wearing all black storm trooper suit is she possible Emperor Palpatines disciple? One of the Emperor's Hands ? With the Royal Emperor guard standing by it makes sense that they are watching over Palpatine who would be inside the bacta tank.