Nuhrii

Nuhrii was a Ta-Matoran who was one of the six Matoran who knew the location of the Great Disks. He wanted the disk so he could forge the ultimate Kanohi Mask.

Pre-Cataclysm
Nuhrii was a skilled Mask Carver, and was the mentor of Vakama. When Dume asked Vakama to make a Mask of Time, Nuhrii became extremely jealous of his former student. He tried to find the Ta-Great Disk to create an all-powerful Kanohi, but was found by Vakama, now a Toa Metru, and taken to the Great Temple for questioning. He told Vakama the Disk's location, then helped him defeat the Morbuzakh by fusing with five other Matoran into the Matoran Nui. After that, he was captured by a Nuurakh, and in the struggle broke his Ruru and immediatly went comatose, thus making it easy for him to be put into a Matoran Pod on the order of Makuta.

Post-Cataclysm
After the Great Cayaclysm, Nuhrii's Matoran Pod was captured by the Visorak. After the Battle for Metru Nui, Vakama resued Nuhrii's pod and took it to Mata Nui. There, he fitted the Matoran with a black Kaukau, but didn't like acting as a Turaga around him, as he knew that Nuhrii had once been his mentor, even though Nuhrii did not.