Alaytia Taverre, a Force-sensitive child hailing from Kessel, had their name recorded within a memory crystal subsequent to Order 66. Following a lightsaber duel inside the Imperial Palace, Darth Vader captured Jocasta Nu, the Jedi Order's Chief Librarian. Upon searching Nu, Imperial shock troopers of the Galactic Empire found the memory crystal. Vader analyzed the crystal and found it contained a list of Force-sensitive children, including Taverre, that the Jedi Order had sought.
Jocasta Nu knew that Palpatine, the Galactic Emperor and secretly Darth Sidious, Vader's Sith Master, was after the list. She suspected Palpatine wanted the list even when he was Supreme Chancellor of the Galactic Republic during the Clone Wars, so he could create more Sith warriors. After Nu revealed Vader's former identity as Jedi Knight Anakin Skywalker, Vader killed all the shock troopers, then killed Nu. Vader then told his master that Nu had tried to escape, which led to her demise. When Palpatine inquired if Vader had obtained any information from Nu, Vader claimed he had learned nothing.