Hay-Zu - styling himself as "The Big Hay-Zu" - was a minor character in Star Wars: The Clone Wars. Appearing in the episode "Nomad Droids", he was a member of the miniature-sized Patitite race from the planet Patitite Pattuna. He was voiced by Kevin Michael Richardson.
The Big Hay-Zu ruled over his people as a tyrannical dictator, sending some of his people's children to fight his wars. Those children were considered the "lucky ones".
In 20 BBY, the droids C-3PO and R2-D2 crash-landed a Y-Wing onto Patitite Pattuna after escaping from a Republic cruiser that had been attacked by Separatists. The Patitites reacted to the droids' presence with hostility and captured them. Unsure of what to do with the offworlders, they summoned the Big Hay-Zu.
Hay-Zu arrived on a repulsorlift throne, proceeded by musicians and dancers. Upon seeing the pair, he became angry after believing R2 had challenged his authority, but then grew bored when C-3PO tried to explain that the pair needed help repairing their crashed ship. Unmoved by the droids request for help, Hay-Zu ordered the droids to leave his world and had them unbound so they could go. Once free, R2 approached the ruler and made a surly comment, causing C-3PO to smack him on the dome and knock him over, resulting in Hay-Zu being crushed to death beneath R2's chassis. Seeing that their ruler was dead, the Patitites cheered and chanted in joy. They then aided the droids in repairing their ship but asked C-3PO to stay 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.