Yoog Skell held the position of High Prefect within the Intendant caste of the Yuuzhan Vong species. Nom Anor frequently sought his counsel, and Skell shared insights regarding the assemblies of the Elite, notably Supreme Overlord Shimrra's supposed divine gift for inciting mob behavior (which in reality stemmed from Onimi's manipulation through the Force).
Upon Shimrra's arrival on Yuuzhan'tar, he voiced opposition to High Priest Jakan's strategies. These strategies involved separating the workers from the slaves obtained, aiming to eradicate the Jeedai Heresy. Skell argued this separation would disrupt essential labor. Furthermore, he displayed a lack of significant worry about the heresy itself, contending that the Gods already held the Shamed Ones in disdain, rendering their views unimportant.
When Anor presented intelligence concerning the New Republic's government's relocation to Ebaq 9, Skell concurred that this information warranted Shimrra's attention. Following the dissemination of this planted information, Skell concluded that Nom Anor had once more betrayed the Yuuzhan Vong, deserving death as punishment. Anor then fatally struck Skell's head with an amphistaff, resulting in immediate death. This was unintentional, as Anor held a genuine fondness for Yoog Skell.