"Tracker"

Although his story is not exactly clear, Tracker has a great hatred for Visorak. He blames both them and Roodaka for his current state, and for that reason, he is a Dark Hunter.

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

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 has tremendous strength, and his bull's horns have the power to dissolve solid matter. Tracker is currently hunting Spiriah, a member of the Brotherhood of Makuta, who is hiding from both his comrades and the Dark Hunters on the Tren Krom Peninsula (Well, not really hiding, see here.).