Virox

Virox was Makuta Teridax's lieutenant following the latter's takeover of the Matoran Universe, and the arch-nemesis of Toa Ihu.

Biography
Virox was responsible for the experiments done to the Matoran Vesil.

When the Plan came to fruition he, along with Pyrez, were allowed to continue their existence if they swore unwavering and total allegiance to Teridax and aided him in secret.

Makutaverse
Following the completion of the Plan, Virox was given a new laboratory hidden deep in one of the southern islands and tasked with creating a device to control the minds of all Matoran in the universe simultaneously. His experiments were semi-successful, and he created a device that would let the user become an omnipath, but he was accidentally assimilated into it himself. His body was destroyed and his consciousness scattered into all non-sapient life across the Matoran Universe, into plants and unintelligent Rahi. While not technically alive, his consciousness has not been destroyed and thus cannot be considered truly deceased.

Abilities and Traits
Reclusive and paranoid, Virox spent more time in his laboratories than with his fellow Makuta. He was totally amoral, having no problem experimenting on innocent Matoran or Toa, or on one occasion even another Makuta.

Virox had access to the natural powers of a Makuta; he was a Shadow elemental, could project a Shadow Hand, shapeshift, and had access to all forty-two Kraata powers.

Mask and Tools
Virox wears the Kanohi Vahkya, the Great Mask of Slavery, though in the past he also wore a Crast, the Great Mask of Repulsion, and a Felnas, the Great Mask of Disruption. He carried a Dual Acid Claw and a Cordak Blaster, though he barely saw battle.

Trivia

 * His name is a play on the word 'virus'.