Mamru
Chief Prospector of Onu-Koro
Mamru was an Onu-Matoran native to Metru Nui who became the Chief Prospector of Onu-Koro on Mata Nui, responsible for finding the ore deposits of the Great Mine before eventually evacuating to Spherus Magna.
Mamru was an Onu-MatoranOnu-MatoranEarth-wielding Matoran of the deep who adapted to darkness and built the Matoran Universe's defensive cavalry. native to Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive. who, on Mata NuiMata Nui (Location)An island created by accident on the Great Spirit's face, home to the Matoran for a thousand years., rose to become the Chief Prospector of Onu-KoroOnu-KoroOnu-Koro was the earth engineers' city, where underground isolation created one of Mata Nui's most self-sufficient settlements, until the Bohrok came.. His work was to locate the ore deposits of the Great MineGreat MineOnu-Koro's most important mining complex, and home to an unexpected gateway to the island's darkest secrets., the heart of the underground village's labor.
Metru Nui and the Great Rescue#
Prior to the Great CataclysmThe Great CataclysmThe day Makuta Teridax put the Great Spirit to sleep, the Great Spirit Robot fell from the sky, Metru Nui flooded, and Voya Nui tore loose from the Southern Continent., Mamru lived and worked in Onu-MetruOnu-MetruThe deep archive-city that made mining and historical records preservation the beating heart of Metru Nui.. He was captured by the VahkiVahkiMetru Nui's mechanical law enforcement squads, designed to maintain rigid order but ultimately undermined by chaos beyond their programming. under the command of the MakutaMakuta (Species)Shadowy Antidermis beings and the Brotherhood's elite, Makuta commanded darkness and shaped the Matoran Universe's fate. TeridaxTeridaxTeridax orchestrated a thousand-year scheme that ended with him occupying the Great Spirit Robot itself before his death on Bara Magna., who was disguised as TuragaTuragaFormer Toa who fulfilled their destiny and transformed into leaders. Turaga wield Noble Kanohi masks and weakened elemental powers, guiding their communities. DumeDumeDume is a Turaga of Fire and the former ruler of Metru Nui, distinguished by his red and black coloring and the Noble Kanohi Kiril, the Mask of Regeneration. As a member of the Turaga of Metru Nui, he wields a Staff of Office and commands a weakened mastery of Fire. He later resides on the reformed Spherus Magna., and forced into a Matoran SphereMatoran SphereRound containers that wiped memories and hid Makuta Teridax's manipulation of the Matoran.. The Toa MetruToa Metru: Heroes of Metru NuiThe Toa Metru were the six Toa transformed from Matoran of Metru Nui by Toa Lhikan's Toa stones, who defeated the Morbuzakh, sealed Teridax after the Great Cataclysm, survived mutation into Toa Hordika, and carried the city's Matoran to the island of Mata Nui before becoming Turaga. later rescuedThe Great RescueThe campaign that brought the mutated Toa Metru back into Visorak-occupied Metru Nui to recover the sealed Matoran spheres, find Keetongu, and break the hordes' grip on the city long enough to evacuate every Matoran to the surface of Mata Nui. him, and he awakened on the shores of Naho BayNaho BayThe body of water that made up most of Ga-Wahi, named for a fallen Toa of Water and home to the floating village of Ga-Koro on its surface. on the island of Mata NuiMata Nui (Location)An island created by accident on the Great Spirit's face, home to the Matoran for a thousand years..
The effects of the Matoran Sphere left Mamru physically shrunken and weakened, and stripped him of his memories of life on Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive.. Despite this, he labored on the construction of Onu-KoroOnu-KoroOnu-Koro was the earth engineers' city, where underground isolation created one of Mata Nui's most self-sufficient settlements, until the Bohrok came. under the supervision of TuragaTuragaFormer Toa who fulfilled their destiny and transformed into leaders. Turaga wield Noble Kanohi masks and weakened elemental powers, guiding their communities. WhenuaWhenuaToa Metru of Earth and later Turaga of Onu-Koro, formerly an Onu-Metru archivist whose career in the Archives shaped his role across the rescue of Metru Nui and the long residency on Mata Nui., using materials salvaged from the airships of the Great RescueThe Great RescueThe campaign that brought the mutated Toa Metru back into Visorak-occupied Metru Nui to recover the sealed Matoran spheres, find Keetongu, and break the hordes' grip on the city long enough to evacuate every Matoran to the surface of Mata Nui..
Chief Prospector of Onu-Koro#
In Onu-KoroOnu-KoroOnu-Koro was the earth engineers' city, where underground isolation created one of Mata Nui's most self-sufficient settlements, until the Bohrok came., Mamru became the Chief ProspectorProspectorProspectors sorted ore, protodermis, and minerals for mining settlements, work that was less glamorous than important to Matoran survival.. It was his job to find the ore deposits in the Great MineGreat MineOnu-Koro's most important mining complex, and home to an unexpected gateway to the island's darkest secrets., the greatest of the Onu-Matoran mines. He placed great faith in his fellow prospector AziboAziboAzibo was an Onu-Matoran prospector of Onu-Koro whose discovery of the Great Sundial at the bottom of Mine Shaft B opened a concealed passage into Mangaia., whose knowledge of the guiding principle of Onu-KoroKoroThe Koros were the six elemental villages established by the Toa Metru on Mata Nui after the Great Rescue, each tied to one element and one Turaga. he considered invaluable to their work.
Mamru briefly vacated Onu-KoroOnu-KoroOnu-Koro was the earth engineers' city, where underground isolation created one of Mata Nui's most self-sufficient settlements, until the Bohrok came. during the BohrokBohrokHive-minded mechanical creatures designed to reshape worlds, the Bohrok represent a threat the Toa Mata never expected. war and was later rebuilt following the defeat of the Bohrok-KalBohrok-KalSix elite Bohrok designed to free the imprisoned Bahrag, they nearly defeated the Toa Nuva before the Toa turned their own powers against them.. When the RahkshiMakuta (Species)Shadowy Antidermis beings and the Brotherhood's elite, Makuta commanded darkness and shaped the Matoran Universe's fate. attacked the village, he was evacuated with the other MatoranOnu-MatoranEarth-wielding Matoran of the deep who adapted to darkness and built the Matoran Universe's defensive cavalry..
Return to Metru Nui and Spherus Magna#
Mamru later aided in the construction of the boats used to return to Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive., and helped repair the city until the Staff of ArtakhaThe Staff of ArtakhaA restoration artifact forged by Artakha himself, used by Helryx to reverse the environmental damage of the Great Cataclysm. restored the rest. Sometime afterward he evacuated the Matoran UniverseMatoran UniverseA civilization of biomechanical beings living inside a colossal robot, destroyed when Teridax seized control. and went on to live on Spherus MagnaSpherus MagnaA desert world of ancient conflict that became the merger point of the Matoran Universe and Bionicle's true endpoint.. He was recorded under both the names Mamoru and Mamru, the latter being the more widely accepted form.
Frequently asked questions
- Who was Mamru?
- Mamru was an Onu-Matoran native to Metru Nui who, on the island of Mata Nui, rose to become the Chief Prospector of Onu-Koro. His job was to locate the ore deposits in the Great Mine, the greatest of the Onu-Matoran mines.
- How did Mamru come to live on Mata Nui?
- Before the Great Cataclysm, Mamru lived and worked in Onu-Metru until he was captured by the Vahki under the command of the Makuta Teridax, who was disguised as Turaga Dume, and forced into a Matoran Sphere. The Toa Metru later rescued him, and he awakened on the shores of Naho Bay on the island of Mata Nui.
- What did the Matoran Sphere do to Mamru?
- The effects of the Matoran Sphere left Mamru physically shrunken and weakened, and stripped him of his memories of life on Metru Nui. Despite this, he labored on the construction of Onu-Koro under the supervision of Turaga Whenua, using materials salvaged from the airships of the Great Rescue.
- What happened to Mamru after the events on Mata Nui?
- Mamru briefly vacated Onu-Koro during the Bohrok war and was rebuilt following the defeat of the Bohrok-Kal, and he was evacuated when the Rahkshi attacked the village. He later aided in building the boats used to return to Metru Nui, helped repair the city, and eventually evacuated the Matoran Universe to live on Spherus Magna.
- Why is Mamru sometimes called Mamoru?
- Mamru was recorded under both the names Mamoru and Mamru, with the latter being the more widely accepted form.
Gallery

Images via BIONICLE Wiki (Biosector01)
Sources
- WikiMamru — BS01 character entry
- WikiGreat Mine — BS01 location entry
- VideoMata Nui Online Game — BS01 media entry
Spotted a factual error or a primary source we missed? Email a correction. Every flagged claim gets reviewed.
Related entries
Whenua
Toa Metru of Earth and later Turaga of Onu-Koro, formerly an Onu-Metru archivist whose career in the Archives shaped his role across the rescue of Metru Nui and the long residency on Mata Nui.
Teridax
Teridax orchestrated a thousand-year scheme that ended with him occupying the Great Spirit Robot itself before his death on Bara Magna.
Toa Metru: Heroes of Metru Nui
The Toa Metru were the six Toa transformed from Matoran of Metru Nui by Toa Lhikan's Toa stones, who defeated the Morbuzakh, sealed Teridax after the Great Cataclysm, survived mutation into Toa Hordika, and carried the city's Matoran to the island of Mata Nui before becoming Turaga.
Azibo
Azibo was an Onu-Matoran prospector of Onu-Koro whose discovery of the Great Sundial at the bottom of Mine Shaft B opened a concealed passage into Mangaia.
The Great Rescue
The campaign that brought the mutated Toa Metru back into Visorak-occupied Metru Nui to recover the sealed Matoran spheres, find Keetongu, and break the hordes' grip on the city long enough to evacuate every Matoran to the surface of Mata Nui.
Naho Bay
The body of water that made up most of Ga-Wahi, named for a fallen Toa of Water and home to the floating village of Ga-Koro on its surface.
Mentioned in2 entries
Azibo
Azibo was an Onu-Matoran prospector of Onu-Koro whose discovery of the Great Sundial at the bottom of Mine Shaft B opened a concealed passage into Mangaia.
Mahiki
The Great Mahiki granted its wearer true shapeshifting, while the Noble variant projected only external illusions. Matau was its most prominent bearer.
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