I'm suprised no has mentioned kira meeting with a child of the emperor, they where confused when the emperor died, they are linked to him, they where getting commands from him but they were confusing
Emperor's essence
The position of Voice of the Emperor is a major plot point in Act III of the Sith Warrior class in the massively multiplayer online role-playing game Star Wars: The Old Republic, released by BioWare and LucasArts in 2011,[8] where the Emperor is voiced by Doug Bradley.[17] The player's master, Darth Baras, betrays his apprentice at the beginning of Act III as he attempts to proclaim himself Voice, and the Emperor's Hand appoints the player as the new Emperor's Wrath.[1] After eliminating Baras' sister Darth Ekkage on Belsavis,[18] the player searches for and finally locates the true Voice on Voss, which they must battle when Sel-Makor takes control of the body. After defeating Sel-Makor, the Wrath kills the Voice at the Emperor's command, freeing his essence and allowing him to take on a new Voice—the Human male that Jedi Knight players encounters in "Doomsday," their Act III finale.[9]
The Emperor's Voice is ultimately killed by the Jedi Knight during their battle,[9] though it is only revealed later in a message to the Emperor's Wrath that the Emperor's essence did in fact survive. Servant One of the Emperor's Hand explains to Sith Warrior players that the Emperor returned to his true body and entered into a deep slumber in order to heal from the damage inflicted by the Knight during their fight, thereby eliminating the need for a Voice at that time.
http://starwars.wikia.com/wiki/Emperor's_Voice_%28Sith_Empire%29