Ururu

Ururu, also known as Ululu, or Tyranis for the English adaptation of the first five episodes of Aizenborg.

Powers
Mind control: Ururu has the power to force other animals, including Dinosaurs, to do his bidding.

Fire: He can fire a deadly stream of flames from his mouth.

IQ: Ururu has constantly boasted his IQ was higher than 300.

Electric Bite: Ururu can send volts of electricity through his massive jaws.

History
Watching as the world progressed, the Dinosaurs, who escaped extinction by burrowing under ground, where finally sick of being held captive by the stones that surrounded them. They needed a leader and Ururu stepped forward. The Tyrant Lizard King observed as countless of other dinosaurian monsters attacked the Earth, including the Gilas Brothers (Ultraman Leo), Neronga (Ultraman), and several saurians from the Fireman series. Finally, Ururu's plan was formed. He went to war with the human race.

Summoning his best warriors, Ururu sent them to the surface world, but time and time again, his hench saurians were defeated, until Ururu's true master, Dinosaur Satan Grottes, violently uprooted Ururu's leadership position on the top of the food chain, whipping the tyrant lizard into submission and sending him to fight the Aizenborg ship by himself. Little known to Ururu and Grottes, the Aizenborg's own Zen had made friends with Topura, a triceratops that defected from the Dinosaur Army due to injuries. Ururu, feining his own injuries, got close enough to Zen before launching an attack, only to be attacked by Topura in a frantic frenzy.

A battle between the tyranosaurus and triceratops raged, until Ururu lifted the would be savior up and tossed him aside like he was nothing. Having defeated Topura, Ururu turned his attention to the Aizenborg Super Ship. After biting it and surging it with electricity, he tossed it to the ground and began to gloat. He did it! He defeated the Human's main weapon! And in his moment of triumph, the Tyrant king began to dance, only for the Aizenborg to recharge itself, launch up, and slice through the terrible lizard king's throat, beheading the saurian and causing him to explode.

Trivia
Ururu's suit is actually the suit, with different eyes, of the Tyrannosaurus Rex from the Tsuburaya Film Last Dinosaur. The suit was also used in another one of Tsuburaya's dinosaur related shows.

Ururu's battle with Topura is a homage to the fight between the Tyrannosaurus Rex and Triceratop's fight in ''Last Dinosaur. ''

His roar is actually a modefied Godzilla roar with a Rodan roar mixed in.