Bionicle category
Metru Nui
158 entries tagged Metru Nui. Every entry is sourced from Greg Farshtey’s serials, the BIONICLE novels, comics, or BS01 wiki cross-checks.
- Chute: the Transport Tubes of Metru NuiA Chute was a pipe of liquid protodermis held together by a magnetic field, used across Metru Nui to carry Matoran, cargo, and Rahi. The system was run by the Le-Matoran and ran throughout the city until the Great Cataclysm left it abandoned.
- Toa 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.
- AirshipAirships were flying cargo vessels used across the Matoran Universe, based in Metru Nui at the Le-Metru Moto Hub and flown by skilled Le-Matoran pilots using Kanoka and pressurized protodermis for lift and thrust.
- Chute LurkerChute Lurkers were a rare type of omnivorous Rahi that hunted inside the protodermis chutes of Metru Nui, anchoring at sharp corners to seize passing travelers before the Great Cataclysm drove them out.
- Colony DroneThe Colony Drone was a small, harmless bipedal Rahi of Metru Nui whose Rhotuka spinners produced energy the Visorak fed on. The hordes penned the drones in webbing and carried them wherever they went.
- DwellerDweller was a Dark Hunter assassin who spent over a thousand years hidden in the Archives of Metru Nui, monitoring the city for the Shadowed One and killing through mental probes and induced nightmares.
- Protodermis SeaThe Protodermis Sea, also called the Silver Sea, was the seemingly endless ocean in which the city of Metru Nui floated, crossed by the Toa Metru during the Great Rescue and resting place of more than one lost Kanohi.
- AftA Ta-Matoran native to Ta-Metru who became a Lava Farmer on Mata Nui, served through the Bohrok War and the Reign of Shadows, and migrated with his fellow Ta-Matoran to the Great Volcano on the reformed Spherus Magna.
- AmayaAmaya was a Ga-Matoran native to Metru Nui who taught Vhisola before the Great Cataclysm and later served as the Flax Maker of Ga-Koro on the island of Mata Nui.
- Archives MoleSmall, harmless burrowing Rahi engineered by the Makuta, originally native to Po-Metru and forced into the shadowy recesses of the Onu-Metru Archives, where their cooperative behaviour built living ladders and bridges through the lower levels.
- Surrender or Run: The Vahki Chase Across Metru NuiThe Vahki sweep that scattered the Toa Metru after their failed audience at the Coliseum, the Bordakh's use of the Staff of Loyalty on Nokama, and Vakama's discovery that a Kanoka launcher could double as a flight tool.
- Web of ShadowsThe Toa Metru's return to a Visorak-occupied Metru Nui, their mutation into Toa Hordika, the corruption of Vakama, and the rescue that closed the city's long captivity.
- Voyage of FearThe Toa Metru's first voyage from a broken Metru Nui to the island of Mata Nui aboard the Vahki Transport Lhikan, the ambush by surviving Nuurakh, and the standoff with the exiled Archivist Mavrah and his prehistoric sea Rahi.
- BranderA Ta-Matoran of Metru Nui who survived the Great Cataclysm, served on the Ta-Koro Guard, and ended his recorded story among the rebuilt Fire Tribe on Spherus Magna.
- Cable CrawlerClimbing-type Rahi of Metru Nui's Le-Metru cable network, created by the Makuta and notorious among Matoran for severing power lines and raiding airship cargo holds.
- Chief ArchivistThe unnamed Onu-Matoran who oversaw the Archives of Metru Nui as head of the Archivist Corps and reported directly to Turaga Dume.
- Dark MirrorThe parallel timeline in which Tuyet kept the Nui Stone, the original Toa Mangai survived, and a Toa of Light from another reality fell through a cracked Olmak into the heart of a Toa empire.
- Fountains of WisdomThe contemplative fountains of Ga-Metru, sites of Matoran reflection that were broken in the Great Cataclysm and restored a thousand years later by the Staff of Artakha.
- Hordika VenomThe toxin used by the Visorak to mutate captured prey into Hordika, the feral half-Rahi state that transformed the Toa Metru into the Toa Hordika in the webs above Metru Nui.
- Kanoka DisksThe protodermis throwing disks of Metru Nui, used in Akilini sport, in Matoran self-defence, in Vahki weaponry, in mask-making, and as the signature armament of the Toa Metru.
- KeahiKeahi was a Ta-Matoran of Ta-Koro and a member of the Ta-Koro Guard, the patroller of the ledge above the lava break that bore his name, and the instructor who trained Hahli in the Kolhii skill of Courage before the championship at Ta-Koro.
- KraahuThe specialist Vahki combiner formed from Zadakh, Keerakh, and Bordakh components, the Kraahu carried knowledge centres throughout its body, could split apart to fight six directions at once, and as a single unit could spray a cloud of stun gas.
- KranuaThe specialist Vahki combiner formed from Nuurakh, Rorzakh, and Vorzakh components, the Kranua could collapse into living protodermis sand to chase lawbreakers through cracks and gratings and reform on the other side.
- The Lhikan: Vahki Transport of the Toa MetruThe first of the two Vahki Transports the Toa Metru christened in honor of the fallen Toa Lhikan, the vessel that carried six Matoran in spheres across the Silver Sea to Mata Nui after the Great Cataclysm.
- MarkaMarka was a Ga-Matoran originally of Metru Nui who reported Nidhiki's pursuit of Vhisola, survived a tentacled Rahi attack at sea, and rose to lead the Shipwrights of Ga-Koro after the Bohrok-Kal crisis.
- Protodermis FallsThe waterfall of liquid Protodermis in Ga-Metru, central to the water district's purification work and bound to the fate of the substance that flowed through Metru Nui.
- RorzakhThe Vahki model assigned to Onu-Metru, the Rorzakh were utterly relentless and carried Staffs of Presence that turned the affected Matoran into an involuntary audio and visual transmitter for their squad.
- RukiA common fish-like Rahi of the Ga-Wahi waters with strong jaws, the Ruki was the staple Matoran catch of Ga-Koro, the natural enemy of the Tarakava, and one of the few small Rahi confident enough to drive larger predators away from its shoals.
- The Scroll of PreparationsThe Great Beings' inscribed list of tasks that the Toa Nuva were required to complete before the Great Spirit Mata Nui could be reawakened, retrieved from the Great Temple in Ga-Metru on the eve of the Karda Nui campaign.
- Sea RahiA class of massive ancient sea Rahi recovered by the Onu-Metru Archives, shut down by Turaga Dume for being too dangerous, and led into the silver sea by the Onu-Matoran Mavrah to an abandoned outpost beyond the Great Barrier.
- The Toa Empire: The Parallel Universe Where the Toa RuledThe Dark Mirror alternate universe in which Toa Tuyet kept the Nui Stone, killed Lhikan, and built a tyrannical empire of Toa across the Matoran Universe, ended by a Takanuva from another reality and a small rebellion led by Pohatu and Lesovikk.
- Underwater Rahi StudyAn Onu-Metru Archives project to study a group of ancient sea Rahi recovered off the coast, ended on Turaga Dume's cull order, and revived as a fugitive expedition in the subterranean waterways beneath Metru Nui.
- The Visorak HordeThe Brotherhood of Makuta's spider-Rahi army under King Sidorak and Viceroy Roodaka, summoned to Metru Nui after the Great Cataclysm to free Teridax and pacify whatever survived in the abandoned city.
- VorzakhThe Vahki model assigned to Le-Metru, the Vorzakh patrolled the chute network and transportation hubs of the air district and carried Staffs of Erasing that wiped a Matoran's higher cognitive functions and left the victim a walking shambler.
- ZadakhThe Vahki model assigned to Po-Metru, the Zadakh were the strongest of the order-force lines and carried Staffs of Suggestion that left any Matoran they struck willing to follow orders from almost anyone.
- AkiliniAkilini was the principal sport of Metru Nui, played with Kanoka disks on the arena floor of the Coliseum and serving as both civic spectacle and the means by which the worth of a freshly forged disk was tested before mask-making.
- The Archives MassacreThe closing atrocity of the Matoran Civil War, in which the Brotherhood of Makuta sealed the warring armies inside the Archives of Metru Nui and released the caged Rahi exhibits upon them.
- AziboAzibo 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 Po-Metru and Le-Metru Recoveries: In the Grip of the MorbuzakhThe Toa Metru's Great Disk-recovery operations in Po-Metru and Le-Metru, the rogue Tunneler in the Sculpture Fields, and Matau's Force Sphere ride through the Notch.
- Legends of Metru NuiThe chronicle of how Toa Mangai Lhikan passed his power to six Matoran, how Metru Nui fell to Teridax, and how Toa Vakama forged the Kanohi Vahi.
- The Awakening of the Toa Metru and the Search for the Great DisksThe formation of the Toa Metru in the Great Temple, the recovery of the six Great Kanoka Disks, and the destruction of the King Root that ended the Morbuzakh crisis in Metru Nui.
- The Quest for the Great Disks and the Burning of the King RootThe Toa Metru's hunt for the six Great Kanoka Disks across the districts of Metru Nui and their assault on the Morbuzakh's central core in the Great Furnace of Ta-Metru.
- The Descent into the Fikou WebAn expedition by the Toa Metru into the maintenance tunnels beneath Onu-Metru to investigate a seawater leak, ending in their first encounter with the shape-shifting Rahi Krahka.
- Legends of Metru NuiLhikan's capture by Nidhiki and Krekka, the awakening of the six Toa Metru, the discovery that Turaga Dume had been replaced by Teridax, the Coliseum betrayal, and the duel above the Silver Sea that ended with the city sealed and the Matoran asleep.
- Web of the VisorakThe Toa Metru's return voyage to a city overrun by the Visorak horde, their capture above the Coliseum, and their forced mutation into the bestial Toa Hordika.
- BordakhThe Vahki model assigned to Ga-Metru, the Bordakh patrolled the canals and schools of the academic district and carried Staffs of Loyalty that turned any Matoran they struck into a willing informant against their own friends.
- The Catapult ScorpionA savage scorpion Rahi of Po-Metru that launched hardened balls of magma from its stinger, nested beneath the Sculpture Fields, and trailed the Kikanalo herds across the plains.
- The Chute SystemThe pressurised liquid Protodermis transit network of Metru Nui, run from Le-Metru's Moto-Hub and carrying Matoran, cargo, and Rahi across the city.
- EhryeEhrye was a Ko-Matoran errand-runner of the Knowledge Towers, one of the six finders of a Great Disk, and a survivor of every era from Metru Nui through Spherus Magna.
- Force SphereThe Metru Nui chute-system hazard in which a broken segment of magnetic field wrapped around itself, swept up debris, and imploded inside the transport network.
- Ga-MatoranThe Water-element Matoran of Ga-Metru and Ga-Koro, exclusively female, who taught the schools of Metru Nui and crewed the boats and bridges of the Mata Nui coast.
- The Great BarrierThe enormous underground dome of rock and solid Protodermis that enclosed Metru Nui and the Silver Sea, sealed Teridax into a cliff face, and was finally cracked open during the Great Cataclysm.
- The Great DisksThe six legendary Kanoka of Metru Nui, one hidden in each district, recovered by the Toa Metru during the Morbuzakh crisis and later fused into the Kanohi Vahi.
- The Great Disruption: the Matoran civil war that nearly killed the Great SpiritRoughly 79,500 years before the Toa Mata awoke, the Matoran of Metru Nui spent four hundred years fighting each other over barge schedules, and the Great Spirit began to fail.
- The Great FurnaceThe largest furnace in Ta-Metru, site of the Morbuzakh King Root's nest and the recovery of the fused Great Disks that became the Kanohi Vahi.
- The 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.
- HafuHafu was a Po-Matoran Carver of Po-Koro, recognized as a Master Carver, who served in the Chronicler's Company and survived the Reign of Shadows.
- The Karzahni PlantThe sentient prototype plant created by Teridax as the predecessor of the Morbuzakh, abandoned in the tunnels beneath Metru Nui after proving too willful to control.
- KeerakhThe Vahki model assigned to Ko-Metru, the Keerakh enforced silence in the Knowledge Towers and subdued lawbreakers with staffs that scrambled a Matoran's sense of time and place.
- The King RootThe sentient central core of the Morbuzakh plant, grown in the Great Furnace of Ta-Metru and destroyed by the Toa Metru using the fused Great Disks.
- The Knowledge TowersThe crystalline scholar-towers of Ko-Metru, where Ko-Matoran seers used knowledge crystals to record observation and prediction for the city of Metru Nui.
- KopekeKopeke was a Ko-Matoran ice carver of Ko-Koro who served in the Chronicler's Company at Kini-Nui and was later elected the third Chronicler of the Matoran Universe.
- KralhiThe first attempt at automated law enforcement in Metru Nui, the Kralhi were decommissioned for draining their captives into uselessness and later re-emerged in the city's underground waterways.
- MackuMacku was a Ga-Matoran of Metru Nui and later Ga-Koro, attendant to Turaga Nokama, Kolhii partner to Hahli at the championship at Ta-Koro, and a member of the Chronicler's Company.
- The Maintenance TunnelsThe underground tunnel network beneath Metru Nui, nicknamed the Fikou Web, used by Archivists, Vahki, and the Toa Metru during the escape from the city.
- Matoran SpheresThe silver hibernation pods used by Teridax, posing as Turaga Dume, to capture, store, and transport the entire Matoran population of Metru Nui during the Great Cataclysm.
- MavrahA Metru Nui Archivist who fled his city rather than let Turaga Dume cull his pet sea Rahi, drowned in a feeding frenzy a thousand years before the Great Cataclysm, and was rediscovered alive aboard the Red Star.
- MetruIn the Matoran language a metru was a single district of Metru Nui; the city was divided into six such districts, one for each element, and the term covered both the place and the elemental community that lived in it.
- The Mountain in BalanceThe Mountain in Balance was the unstable Po-Metru sculpture that hid the Po-Metru Great Disk, nearly killed Onewa during the retrieval, and gave the Toa Metru their first hard read on Ahkmou's intentions.
- NixieNixie was a Ga-Matoran Astronomer of Ga-Koro who tracked the Red Star, recorded prophecies, and supplied Takua with the Gnomon that opened the Onu-Wahi Sundial.
- The NotchThe Le-Metru chute section that housed the Le-Metru Great Disk, was entered by Matau through an active Force Sphere, and was destroyed by the same sphere's implosion immediately afterward.
- NuhriiNuhrii was a Ta-Matoran mask-maker of Metru Nui, one of the six finders of a Great Disk, who later served in the Ta-Koro Guard on Mata Nui.
- NuurakhThe Vahki model assigned to Ta-Metru, the Nuurakh were the fastest of the order-force lines and used Staffs of Command to push a single overriding directive into the mind of any Matoran they struck.
- OrkahmOrkahm was a Le-Matoran Ussal rider of Le-Metru, Matau's chief rival, one of the six finders of a Great Disk, and later a Gukko Force member on Mata Nui.
- Po-MatoranThe Stone-element Matoran of Po-Metru and Po-Koro, carvers and quarry workers, the most athletic of the Matoran types and the population behind the Kohlii and Akilini circuits.
- Sculpture FieldsThe Sculpture Fields were the open Po-Metru courtyards where Po-Matoran carvers worked statues too large for any building, hid one of the Great Disks, and gave Onewa his first confrontation with Ahkmou's betrayal.
- The Silver SeaThe vast body of unrefined liquid Protodermis surrounding Metru Nui inside the Great Barrier dome of the Matoran Universe.
- Ta-MatoranThe Fire-element Matoran of Ta-Metru and Ta-Koro, forgers of masks and Kanoka, lava farmers, and the standing core of the Ta-Koro Guard during the war for Mata Nui.
- TamaruTamaru was a Le-Matoran Forest Navigator of Le-Koro, Kongu's Kolhii partner, and the Le-Koro representative in the Chronicler's Company at the Battle of Kini-Nui.
- TehuttiTehutti was an Onu-Matoran archivist of Metru Nui, one of the six finders of a Great Disk, whose Archives research produced the Matoran Nui technique.
- Time TrapVakama's solo descent into the Silver Sea to recover the Mask of Time, his capture by the Dark Hunter Voporak, the Teridax illusion that followed, and the three-way struggle over the Vahi between Vakama, the Shadowed One, and Teridax.
- Turaga DumeThe Turaga of Metru Nui for sixteen thousand years, a former Toa of Fire who saved Lhikan's life and was abducted and impersonated by Teridax.
- The Vahki TransportThe multi-legged cargo vehicle built by the Vahki of Metru Nui and used by the Toa Metru to escape the city across the Silver Sea after the Great Cataclysm.
- VhisolaVhisola was a Ga-Matoran student of Nokama, one of the six finders of a Great Disk, whose research deduced the location of the Morbuzakh King Root.
- The 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.
- NorikToa of Fire and leader of the Toa Hagah, who broke with the Brotherhood of Makuta to recover the Avohkii and led his team through a thousand years of mutation as a Rahaga before being restored.
- AgniAgni is a red Ta-Matoran from Metru Nui who serves in the Ta-Koro Guard. He wears a powerless Miru and holds an inactive elemental affinity for Fire. Agni resides on Spherus Magna.
- AodhanAodhan is a Ta-Matoran native to Metru Nui who resides on Spherus Magna and works as a lava farmer. He bears the colors yellow, black, and red, and wears a powerless Mahiki. As a Ta-Matoran, his elemental affinity for Fire remains inactive.
- KalamaKalama is a Ta-Matoran of Fire native to Metru Nui who wears a powerless Matatu and bears the black and red colors of his kind. He worked in Protodermis Reclamation on Metru Nui before serving as a member of the Ta-Koro Guard, and later came to reside on Spherus Magna.
- KapuraKapura was a red Matoran of Fire who served as a member of the Ta-Koro Guard and formerly as part of the Chronicler's Company. A native of Metru Nui, he later worked as a Vat Controller there, wearing a powerless Ruru on Mata Nui and a powerless Pakari on Metru Nui, and ultimately settled on Bota Magna on Spherus Magna.
- PewkuPewku is an Ussal, a species of Rahi crab associated with the Onu-Matoran, native to Metru Nui and later found on Spherus Magna. Originally blue and orange-yellow in coloration, Pewku molted to a burnt orange, silver, and brown coloring. Legs and claws served as Pewku's primary tools.
- FikouSmall arachnid Rahi associated with Metru Nui's Maintenance Tunnels, the reason the tunnel network earned the nickname Fikou Web.
- Fire GreatswordsThe Toa Mangai's signature weapons, remembered for the molten protodermis rescue that saved Vakama and led to Lhikan's capture.
- MahikiThe Great Mahiki granted its wearer true shapeshifting, while the Noble variant projected only external illusions. Matau was its most prominent bearer.
- Nireta's HutNireta's Hut was the home of the Ga-Matoran navigator Nireta, rebuilt across Metru Nui and Mata Nui and lost in each of the displacements she lived through.
- Protodermis LabsThe Ga-Metru research facility where Ga-Matoran scholars first documented the destiny rule governing energized protodermis transformations.
- Protodermis Reclamation YardThe Ta-Metru lot where broken Kanohi were held before being melted down at the adjacent Protodermis Reclamation Furnace, watched over by the Ta-Matoran Kalama.
- TakuTaku were small bird-like Rahi native to Mata Nui and Metru Nui, capable of diving to great depths to catch fish along the coastal waters.
- Wall of HistoryA series of inscribed walls in Ta-Koro that recorded Matoran life on Mata Nui, maintained by successive Chroniclers and destroyed when the Bohrok cleansed the island.
- Amaya's HutAmaya's Hut was a small driftwood dwelling in Ga-Koro that housed a Flax Weaver, a jellyfish lamp, and the quiet labor of Matoran daily life.
- The Archives of Metru NuiThe Archives of Onu-Metru were the central repository of Matoran knowledge and Rahi specimens, maintained by the Archivist Corps beneath the city's surface.
- Assembler's VillageAssembler's Villages were clusters of Po-Matoran workshops in Po-Metru that assembled Vahki enforcers and other Matoran goods from parts shipped across the city.
- The ColiseumCentral tower of Metru Nui, serving as government seat, sporting arena, and, during Teridax's masquerade, a prison for the city's Matoran population.
- Dermis TurtleThe Dermis Turtle was a small, silver-shelled Rahi native to Metru Nui, valued by Ga-Matoran for its musical cry and its instinctive prediction of storms.
- Dweller in the DeepThe Dweller in the Deep was a colossal Rahi inhabiting the waters beneath Ga-Metru's Great Temple, encountered only once by Toa Metru Nokama.
- Great Temple SquidA massive predatory Rahi of the deep channels beneath Metru Nui, known for twelve beak-tipped arms and a crushing central maw.
- Knowledge TowerThe crystalline spires of Ko-Metru that housed memory crystals, sheltered the district's Scholars, and stored much of the city's accumulated knowledge.
- NivawkNivawk was a scavenger hawk Rahi that served Makuta Teridax as an aerial spy during his impersonation of Turaga Dume.
- Prison of the Dark HuntersA covert detention site near the border of Po-Metru and Onu-Metru, used by Nidhiki and Krekka during their stint as Metru Nui enforcers and the cell where Lhikan mentored three future Toa Metru.
- Vakama's ForgeA Ta-Metru workshop where Vakama crafted Kanohi, failed to forge the Vahi, and received the Toa Stone from Lhikan.
- Vhisola's HomeA Ga-Metru dwelling lined with replicas of Nokama's honours, kept by the Matoran Vhisola as a private tribute to her former teacher.
- LhikanToa of Fire, leader of the Toa Mangai, and the last Toa of Metru Nui, who surrendered his Toa Power to create the Toa Metru and died defending Vakama.
- HewkiiHewkii rose from Po-Metru carver to Mata Nui's foremost kolhii player, then served as Toa Inika and Toa Mahri through the late wars of the universe.
- KonguKongu commanded Le-Koro's Gukko Force before a strike from the Kanohi Ignika transformed him into a Toa of Air who later served among the Toa Mahri.
- KavinikaWolf-like Rahi guards that became uncontrollable threats after their population mysteriously exploded.
- KikanaloBionicle's most underestimated Rahi: intelligent herd creatures whose stampedes terrified even Dark Hunters on Metru Nui.
- Kuma-NuiGiant rat-like Rahi that haunted Metru Nui's Archives before fleeing to Mata Nui.
- VakamaA Ta-Metru maskmaker transformed into the Toa Metru of Fire, leader of his team through the Visorak war, and Turaga of Ta-Koro for a thousand years.
- Long FangsSeven-foot reptilian Rahi that survived the Great Cataclysm only to spark a clash between Dume's law and the Rahaga's vision of adaptation.
- Mask of TimeThe Kanohi Vahi is the Matoran Universe's deadliest mask, capable of stopping or accelerating time, and its creation nearly tore Metru Nui apart.
- Matoran SphereRound containers that wiped memories and hid Makuta Teridax's manipulation of the Matoran.
- Moto-SledNuparu's fast transport vehicle, notable mainly for causing Matau to crash directly into his destiny.
- Rock LionAn aggressive Archives Rahi with a white-hot mane, Rock Lions were fierce deep-level predators.
- NuparuAn Onu-Matoran engineer from Metru Nui who built the Boxor and rose to become a Toa of Earth despite no warrior destiny.
- Toa SuvaThe shrine where six Matoran became Toa Metru by placing their stones and receiving their power.
- TuragaFormer Toa who fulfilled their destiny and transformed into leaders. Turaga wield Noble Kanohi masks and weakened elemental powers, guiding their communities.
- Toa MangaiThe defenders of Metru Nui before the Toa Metru arrived, a team that fell to betrayal and relentless war.
- TarakavaHuge lizard-like Rahi with powerful forelegs, hunted in pairs across Mata Nui and Metru Nui.
- Stone HammerTuraga Onewa's staff and Badge of Office, used to carve Protodermis on Metru Nui.
- TiribombaA Ta-Matoran lava farmer, Tiribomba appeared across Bionicle's major story arcs with no combat abilities and minimal plot impact.
- Ta-MetruThe fire district where Ta-Matoran perfected their craft and powered Metru Nui's industry for thousands of years.
- TunnelerA Rahi that absorbs any power directed at it, but becomes fragile when turned to glass.
- Lava EelThermal Rahi from Metru Nui whose uncontrollable temperature escalation made them unsuitable for permanent domestication despite Ta-Matoran affection for them.
- ArchivistA Matoran keeper of records and relics, the Archivist held one of Metru Nui's deadliest jobs.
- Disk MakerA Matoran occupational caste that crafted Kanoka disks from protodermis on Metru Nui and from bamboo on Mata Nui.
- Fire Pits of Ta-MetruIndustrial lava pits in Ta-Metru where Toa Vakama retrieved a Great Disk, guarded by heat, vines, and Turaga Dume's restrictions.
- Stasis TubePreservation devices that slowed life processes to near-stasis, widely used across the Matoran Universe for both archival storage and secure imprisonment.
- Tower of ToaA Visorak stronghold in Metru Nui, commandeered by the Toa Hordika in 2005.
- Le-MatoranGreen-powered Matoran obsessed with thrills and transport. They're basically Bionicle's daredevils.
- Onu-MetruThe deep archive-city that made mining and historical records preservation the beating heart of Metru Nui.
- MidakAn Onu-Matoran whose obsession with light defied the nature of his species and element.
- ProtocairnRaptor creatures born when Matoran gambled with Energized Protodermis and lost their humanity.
- Ko-MetruKo-Metru was Metru Nui's frozen intellectual quarter, home to the scholarly Ko-Matoran race.
- Matoran Recharge CenterA Metru Nui feeding station where Matoran absorbed energy once yearly, destroyed in the Great Cataclysm and repaired long after.
- Metru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive.
- Moto HubThe vehicle factory at Metru Nui's center, where Le-Matoran built chutes and ground transports before the Great Cataclysm.
- Fikou WebThe maintenance tunnel system beneath Metru Nui's Archives, named for how its paths twist like spider silk.
- Visorak Battle RamA four-legged siege tower piloted by Visorak swarms, designed to crush the last hiding places of Metru Nui's heroes.
- Po-MetruMetru Nui's Stone District, home to carvers whose work defined the city and site of an ancient conflict that threatened to divide it.
- KodanThe Po-Matoran Chronicler who invented Akilini and shaped Metru Nui's recorded history.
- FirestaffA heated tool that forged masks in Ta-Metru, the Firestaff became a symbol of Vakama's ascent from Crafter to Turaga.
- Test TrackThe vehicle testing facility in Le-Metru where Matau crashed and received his Toa Stone, transforming his destiny.
- Le-MetruThe teal district where Le-Matoran managed everything that moved through Metru Nui, from chutes to airships.
- Phase DragonSpeed-obsessed Rahi with the rare ability to phase through solid matter, gentle when stimulated but dangerous when bored.
- VahkiMetru Nui's mechanical law enforcement squads, designed to maintain rigid order but ultimately undermined by chaos beyond their programming.
- MorbuzakhA sentient plant monster created by Teridax to terrorize Metru Nui and control its population through fear.
- Matoro's RahiA Ko-Matoran pet shop on Metru Nui that Matoro ran by trading Rahi from the Archives.
- Kane-RaBuffalo-like territorial Rahi that roamed Mata Nui's plains and Metru Nui's corridors, best known for encounters with the Toa.