Ruru

The Kanohi Ruru was the Mask of Night Vision. The Great Ruru gives its user the power to see clearly in darkness and a limited amount of x-ray vision. It also lets them cast a beam of light for illumination, which could be used to blind opponents. The Noble Ruru only allows its user to see clearly in darkness.

Ruru were carved out of a mixture of Teleport and Enlarge Kanoka on Metru Nui.

Example Usage

 * Great: In BIONICLE 2: Legends of Metru Nui, Toa Whenua used his Ruru to light up a cave that Lhikan, Onewa, Nuju, and himself walked through.
 * Noble: In BIONICLE Chronicles 4: Tales of the Masks, Turaga Whenua used his Noble Ruru to watch two Manas fight each other.

Great

 * Toa Metru Whenua - Formerly; briefly lost when he became a Toa Hordika; became Noble when he transformed into a Turaga.

Powerless

 * Matoran Whenua - Formerly; became Great when he transformed into a Toa.
 * Umbra
 * Garan
 * Idris

Noble

 * Turaga Vakama - Formerly secondary mask; destroyed with Ta-Koro.
 * Turaga Nokama - Secondary mask
 * Turaga Whenua - Primary mask
 * Turaga Matau - Secondary mask
 * Turaga Onewa - Secondary mask
 * Turaga Nuju - Secondary mask
 * The Toa Mata - Formerly secondary masks, lost when they became Toa Nuva.

Powerless

 * Aiyetoro
 * Ally
 * Hafu
 * Jaa
 * Kailani
 * Kapura
 * Kongu - Formerly on Metru Nui; replaced with a Miru on Mata Nui.
 * Nuhrii - Formerly on Metru Nui; replaced with a Kaukau on [[Mata Nui.
 * Taipu
 * Tiribomba
 * Tuuli