To unlock Visas, all you have to do is get you Force standing either 25% Light Side or 25% Dark Side. A cutscene will play showing Visas and her master, Darth Nihilus. The next time you board the Ebon Hawk, she will be waiting in the Port Dormitory. Beat her in a duel and she will join your party. You will also either a)get a lightsaber part if you haven\'t built your lightsaber, or b)a random lightsaber and random item or crystal. If you are playing as a neutral character, and you dont want to change your standing, then you willnot be able to get Visas to join your party.