Jono Dunn was a Galacian male from the planet of Gala, where he worked as an attendant for Queen Veda inside her royal residence. Having been brought up in a family that was devoted to the Beju-Tallah dynasty, he was committed to serving them indefinitely. Dunn viewed his role in the palace as exceptionally honorable, and he was determined to keep it no matter what.
During Qui-Gon Jinn's and Obi-Wan Kenobi's visit to Gala, they realized that the queen was being poisoned by a mysterious agent. Ultimately, Obi-Wan Kenobi learned that Jono was secretly administering poison to the queen, acting on the instructions of Beju and Lonnag Giba, with the goal of preserving his own standing in the palace. Based on Jono's confession, Beju and Giba were convicted of attempting to overthrow the queen, and Wila Prammi was chosen as the new Governor of Gala, replacing them. As a consequence for his actions, Queen Veda instructed Jono to return to his family and learn the ways of farming.