Richard Tyrannosaurton

"Ah! That's the leader of the Animal Mechanicals. His name is Rex. I knew that this guy is leading the Animal Mechanicals the way... although he's just being bossed around by Miles Callisto."

--Su Ji-Hoon, A New Mechanical Destiny

Richard Michael "Rex" Tyrannosaurton is a green tyrannosaurus rex and one of the five Animal Mechanicals. His ability is strength.

In When the Cold Breeze Blows Away, he is part of the Future Alliance, because the Animal Mechanicals are all futuristic animal robots. Despite being an official leader of that team, he is bossed around by his Supreme Leader, Miles Callisto.

However, it was also revealed that he had a mother named Rosie, had a nephew named Rosalina, and a niece named Rudolf, and he had a brother of his own, who is also the uncle of two named Alexander Tyrannosaurton, who are they all killed by a suicidal grenade explosion done by Alexander, in which he survived when the Animal Mechanicals told him to get out of his residence before it explodes.