Na-Jia was a human female who made a living as a thief on the planet of Diado during the era of the Clone Wars. She stole Saesee Tiin's lightsaber, but he ultimately compensated her for giving it back. Later, she was taken prisoner by Confederate troops, who, along with Tiin, wrongly thought she was a Republic operative. She aided him in retrieving his lightsaber from the Confederate forces, and together they successfully broke free.
Na-Jia's initial appearance was in the short story titled It Takes a Thief. This story was included as one of four in the sixth volume of the Star Wars: Clone Wars Adventures series of trade paperbacks. The character was conceived and illustrated by Matthew and Shawn Fillbach. Na-Jia was also included as an entry in The Complete Star Wars Encyclopedia.