"Tracker"

Although his story was not exactly clear, Tracker had a great hatred for Visorak. He blamed both them and Roodaka for his state, and for that reason, he was a Dark Hunter.

As the name states, Tracker and his pet bull were skilled at tracking down targets. Give him the slightest scent or an object just once, and Tracker and his bull would be off, finding the being no matter where it hided.

Tracker's most impressive accomplishment was tracking down Roodaka after she had "died" at the hands of the Toa Hordika. It required 3 Dark Hunters to stop him from killing her, and she was "persuaded" to go to the Dark Hunter's base to discuss her future.

Apart from his tracking skills, Tracker also had tremendous strength, and his bull's horns had the power to dissolve solid matter. Tracker was hunting Spiriah, a member of the Brotherhood of Makuta, little did they know he was already dead.

Trivia

 * Tracker was created by Austin Allen