Kaj was a Chagrian female who resided on the moon Nar Shaddaa, and a member of Jega's Squad. She often scolded her friend Trot for his obsession with dismemberment. After the droid bounty hunter 4-LOM, rebuilt under the control of Doctor Cribiriz Idollax, attacked his partner, Zuckuss, on Nar Shaddaa, Kaj and her associates attempted to fight the droid. Zuckuss located and killed Idollax, and the freed 4-LOM departed. Following their victory, Kaj hugged an irritated Trot.