Nura

Nura was an Onu-Matoran who was captured by an unknown Makuta and transformed into his personal bodyguard. However, Nura turned on him and became an independent warrior.

Metru Nui
Not much is known Nura's life on Metru Nui.

Mata Nui
After being in a Matoran Pod, Nura was very weak. A Makuta told him he could be stronger in return for protecting the Makuta. Nura betrayed him and decided to fight by himself.