A Kilji individual, identified as "Vassal Two," held the position of a Kilji vassal within the Kilji Illumine, the governing body of the Kilji species, and adhered to the tenets of the Kilji religion. During 18 BBY, this individual was stationed aboard the Kilji war cruiser known as the Whetstone, serving as its sensor operator. The Whetstone functioned as the flagship under the command of Generalirius Nakirre, the leader of the Illumine. While the Whetstone was in orbit around the planet Zyzek located in the Unknown Regions, Vassal Two detected the arrival of the Chiss heavy cruiser Springhawk. Subsequently, when the Grysk warship FateSpinner materialized before Nakirre's flagship, Vassal Two exclaimed Nakirre's honorific.
As a member of the Kilji species, the individual known as "Vassal Two" was a Kilji vassal serving their species' nation, the Kilji Illumine, and practiced the Kilji way of order and enlightenment religion. In 18 BBY, this vassal was assigned to the Kilji war cruiser Whetstone, which served as the flagship for Generalirius Nakirre, the ruler of the Illumine. Vassal Two's role on the war cruiser was that of sensor operator. While Nakirre's cruiser was in orbit around the planet Zyzek in the Unknown Regions, the generalirius engaged in a conversation with the Grysk operative "Jixtus," who had formed an alliance with the Kilji ruler. Vassal Two interrupted this conversation to report the arrival of the Chiss heavy cruiser Springhawk in the system, announcing the warship's presence.
Shortly thereafter, the Whetstone departed from Zyzek and journeyed to a star system within the Unknown Regions, following Jixtus's instructions. Upon the Kilji vessel's arrival at the star system, Jixtus's flagship, the massive Shatter-class WarMaster FateSpinner, appeared directly in front of the Whetstone, aiming its weaponry at the Kilji cruiser as a threat to its commander. Upon witnessing this, Vassal Two gasped and shouted Nakirre's title in a strained manner.
Upon seeing the FateSpinner, the skin of Vassal Two rippled against their clothing.
Vassal Two made an appearance in the 2021 novel Thrawn Ascendancy: Lesser Evil, which is the concluding book of the Star Wars: The Ascendancy Trilogy authored by Timothy Zahn.