|Colors||Black, purple, grey, tan, orange|
|Tools and Abilities||Various|
Onu-Matoran are cave-dwelling Matoran with miniscule control over the element of Earth. As Matoran of Earth, they spent most of their lives underground during their time in Metru Nui. As a result of this, their eyes had adapted to function in little light. This meant that they were easily blinded by bright lights.
Onu-Matoran are also known for their strength and durability. They tend to put their faith in the past and find out what can be learned from it. The main Onu-Matoran virtues are Unity, Duty and Destiny, and the principle they get from the virtues is Prosperity. In Metru Nui, most Onu-Matoran worked in the Archives or as Miners. They usually started out as Miners before moving their way up to working in the Archives.
On Mata Nui, Protodermis and lightstone mining were their main occupations. They operated the Ussalry — a defense force that rode Ussals as their steeds. Onu-Matoran have green eyes and wear mainly black armor, often with additional shades of purple, grey, tan and even orange, although only their masks have been seen in orange. All Onu-Matoran are male.
|Current: Aiyetoro • Akamu • Azibo • Damek • Dosne • Gar • Garan • Kaj • Mamru • Mavrah • Midak • Onepu • Reysa • Taipu • Tehutti • Zemya|
|Ta-Matoran • Ga-Matoran • Le-Matoran • Po-Matoran • Onu-Matoran • Ko-Matoran • Av-Matoran • Shadow Matoran|
Vo-Matoran • Fa-Matoran • Su-Matoran • Ba-Matoran • De-Matoran • Fe-Matoran • Bo-Matoran • Ce-Matoran