Tetrax is a Petrosapien Mercenary and Bounty Hunter. One of the last of his race to survive the destruction of Petropia, partly caused by his reckless actions with Vilgax. Since this event, he vowed to protect the galaxy with his might, powers, and arsenal of weaponry.

Tetrax caused the destruction of Petropia by selling one of the Planet’s core crystals to Vilgax for profit. Vilgax wanted to rule the planet, so when they rebelled, he destroyed it with that very crystal.

He lost an eye during a battle with Six Six. It will never regenerate due to the specific weaponry from Six Six, possibly Techadon of origin.

Tetrax was hired by Azmuth to obtain the Omnitrix, after discovering it was found by a 10-year-old human. After battling with Ben, Tetrax believes that the Omnitrix is in safe hands. Thus reporting this positive feedback to Azmuth.

Tetrax unlocked the DNA sample for Ben’s Petrosapien transformation, Diamondhead.

Due to his species being wiped out, his ship houses numerous flora and fauna that are endangered throughout the Galaxy,

Due to being an adult, Tetrax is well adverse to his powers and abilities. But chooses to rely on his equipment and weapons so that he doesn’t show that he’s a Petrosapien.

He has a personal collection of hoverboards. Equating to almost hundreds for many occasions.

He visits Ben on occasion to assist each other with missions. Becoming some sort of a mentor figure for Ben along with Grandpa Max.

Eventually, Ben utilizes a unique feature in the Omnitrix to revive the rest of his Planet Petropia. Along with help from the Petrosapiens millenia-long enemy, the Crystalsapiens.

Tetrax is a battle-hardened bounty hunter with a strong desire to do what is right. He is honour-bound and respects the art of fighting, very similar to an Earth Samurai. Tetrax helps Ben become a better hero, teaching him to use the Omnitrix wisely, partly due to his involvement in the destruction of Petropia.