Nidhiki

Nidhiki was once a Toa of Air inMetru Nui alongside Toa Lhikan. In the war between the Toa and the Dark Hunters, he struck a deal: he would lay a trap for the Toa if the Hunters would let him rule Metru Nui. However, Lhikan found out about the trap and set up a counter-trap of his own, winning the war for the Toa. When the Dark Hunters were expelled from the city, Nidhiki was forced to go as well. After Nidhiki joined the Hunters and trained recruits for a while, teaching others-including Piraka Vezok from his experience as a Toa. Wanting to be more than a teacher, he asks to be sent on missions. He gets his wish, but to his displeasure is paired with a rather dim, brutish Hunter named Krekka, Roodaka showed up looking for training, and Nidhiki offered to reward her if she would help him escape. Instead, she warned The Shadowed One about Nidhiki's plan, and mutated him into an Insectoid monster so that he would never be accepted anywhere but the Hunters.

Nidhiki is vicious and cunning, with no regard for duty or honor. He is extremely intelligent and understands that fear can sometimes be a more powerful tool than force. He is usually paired with Krekka (to his displeasure), as Krekka can be effective when following someone else's plan, and Krekka's loyalty to the Hunters keeps Nidhiki from succeeding in any potential betrayal. The Shadowed One made Nidhiki personally responsible for Krekka's well-being (which keeps Nidhiki from just killing off his partner).

In his insectoid form, Nidhiki can spit Energy webs, force bolts, and Kanoka Disks from his mouth.

In their last mission, Nidhiki and Krekka kidnapped Toa Lhikan and tried to stop the Toa Metru from finding the six Great Kanoka Disks. In the end, Makuta absorbed Nidhiki and Krekka into his body to increase his power and killing them.