The Kilji vassals were beings who were either followers of, or had been enlightened by, the Kilji way of order and enlightenment belief system. They lacked independent thought and could not initiate any action without the explicit command of their master. This master could be the Kilji Illumine government leader, Generalirius Nakirre, or the General Crofyp. Those who served under either of these Kilji leaders would echo the Kilji enlightenment phrase, "I obey," each time their master issued an order. Around the year 18 BBY, some vassals were in service to the generalirius on board his Kilji war cruiser, the Whetstone. Other vassals, specifically Vassal One, Vassal Two, Vassal Three, and Vassal Four, were under Crofyp's command on his war cruiser, the Anvil. Following Nakirre's death at the hands of "Jixtus," who was his Grysk ally, his vassals--one, two, and three individuals--shifted their allegiance to Qilori, the Whetstone's navigator.
The Kilji vassals made their initial appearance in the 2021 novel titled Thrawn Ascendancy: Lesser Evil, which was written by Timothy Zahn.