Hay-Zu, who referred to himself as the Big Hay-Zu, was a male Patitite individual, an inhabitant of the planet known as Patitite Pattuna. During the period of the Clone Wars, he held dominion over his species as a dictator, forcing their offspring to participate in his conflicts. When Patitite scouts apprehended the droids R2-D2 and C-3PO, Hay-Zu was summoned to meet them. He issued a demand for the droids to depart from his planet, but met his death when R2 accidentally fell upon him.
During the Clone Wars, a period of conflict between the Galactic Republic and the Confederacy of Independent Systems, Hay-Zu, a male Patitite, exerted his authority over his species on their homeworld, Patitite Pattuna. He conscripted some of his people's children to serve as soldiers in his wars, a fate that was considered fortunate among the Patitites. When Patitite scouts, including Tagoo and Jimba, discovered the droids C-3PO and R2-D2 wandering on their planet, they restrained and bound the outsiders, unsure of how to proceed, they summoned Hay-Zu.
The ruler arrived on a repulsorlift throne, accompanied by musicians and dancers. Upon seeing the droids, he was angered, believing R2 had challenged him, then grew bored when C-3PO attempted to explain their need for help repairing their crashed ship. Unmoved by their plea, Hay-Zu ordered the droids to leave and had them unbound. Once free, R2 approached the ruler and made a surly comment causing C-3PO to smack him on the dome and knock him over, crushing Hay-Zu. Witnessing the death of their tyrannical leader, the Patitites erupted in cheers and joyful chants. Subsequently, they assisted the droids in repairing their ship, but requested that C-3PO remain as Hay-Zu's replacement. The droid instead introduced democracy to the Patitites, leaving them to argue over who should be voted in as leader.
Hay-Zu was a tyrannical dictator who ruled his people with an iron fist, his ego and sense of entitlement were not limited by his size. Despite his relatively short stature of 0.43 meters (1 [foot](/article/foot], 5 inches), his people unquestioningly obeyed his commands, believing it was for their own good. He was willing to do or say almost anything to maintain his power over the Patitite people. He sent Patitite children to fight his wars. Remaining neutral, Hay-Zu did not care about galactic politics and warned his people that no off-world visitors were friendly, causing them to attack strangers on sight. He had [purple](/article/color] skin, yellow [eyes](/article/eye], and no hair.
When brought before C-3PO and R2-D2, he declared that on Patitite Pattuna, his word was absolute truth. He later became enraged, perceiving R2-D2's actions as a challenge to his authority. He became bored and yawned when C-3PO explained he and R2's situation, and refused to give them aid, claiming he was letting them live because he was in a good mood. When R2 was free and challenged Hay-Zu, the Patitite was unimpressed by the astromech droid.
Hay-Zu's creation occurred during the production of the fourth season of Star Wars: The Clone Wars, and he made an appearance in the episode titled "Nomad Droids." His voice was provided by Kevin Michael Richardson, who also lent his voice to numerous other characters within the television series. The conceptual artwork depicting Hay-Zu and the other Patitites was crafted by the artist Randy Bantog.