Onepu
Onepu is an Onu-Matoran and the High Commander of the Ussalry, bearing a Pakari and wearing the purple and black colors of his kind. Connected to the element of Earth, he resides on Spherus Magna.

Onepu is an Onu-MatoranOnu-MatoranEarth-wielding Matoran of the deep who adapted to darkness and built the Matoran Universe's defensive cavalry. connected to the element of Earth, distinguished by the purple and black coloring of his kind and the PakariPakariThe Mask of Strength amplifies physical power and never stops working, giving its wearer a constant edge., the Mask of Strength, that he wears. He served as High Commander of the Ussalry, the mounted Ussal-crab corps of Onu-Koro, and was among the Onu-Matoran who at one time most likely worked as an Archivist.
On the island of Mata Nui, Onepu took part in the Battle of Kini-Nui, the largest conflict involving the Matoran of the island. In its aftermath he met with the revived Chronicler Takua and informed him that something strange was happening in Onu-Koro, sending Takua on toward the underground village with the Ussal crab Pewku.
When the Bohrok swarms laid siege to Onu-Koro, the inventor Nuparu discovered an inactive Gahlok and learned that the Bohrok were non-living machines paired with Krana. With aid from Onepu and Taipu, Nuparu modified the Gahlok shell into a combat vehicle called the Boxor, which dislodged a Bohrok's Krana with powerful punches. Onepu went on to serve in the Boxor Squad alongside Nuparu, Taipu, and Damek, groups of Matoran piloting Boxors who were dispatched to Ga-Koro, Le-Koro, and other locations to fight the swarms.
Onepu was also among the Matoran who claimed a Copper Mask of Victory, the prize awarded in the koro games, joining winners such as Hafu, Hahli, Hewkii, Kopeke, Macku, and Takua. He later resided on Spherus Magna following the evacuation of the Matoran Universe.
Gallery

Images via BIONICLE Wiki (Biosector01)
Sources
- WikiOnepu — Bionicle Fandom wiki cross-reference
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Related entries
Pakari
The Mask of Strength amplifies physical power and never stops working, giving its wearer a constant edge.
Onu-Matoran
Earth-wielding Matoran of the deep who adapted to darkness and built the Matoran Universe's defensive cavalry.
Damek
Damek was a purple and black Onu-Matoran of the element of Earth who wore a Miru. He served as a Boxor pilot and guard on Mata Nui and as an Archive Guard in Metru Nui, and later resided on Spherus Magna.
Kaj
Kaj is a purple and black Onu-Matoran of the element of Earth, serving as a member of the Onu-Koro Guard and as a Lightstone Miner. He wears a Kanohi Huna and resides on Spherus Magna.
Taipu
Taipu is a black and tan Onu-Matoran of the element of Earth who resides on Spherus Magna. A miner by trade, he wields a pickaxe and wears the Kanohi Pakari.
Zemya
Zemya is a black Onu-Matoran of Earth who works as a store owner on Spherus Magna and wears a Kanohi Hau.
Mentioned in32 entries
Akilini
Akilini 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.
Boxor
Built by Nuparu from a salvaged Gahlok shell, the Boxor was the first Matoran-engineered combat machine and a key resistance asset against the Bohrok swarms.
Chief Archivist
The unnamed Onu-Matoran who oversaw the Archives of Metru Nui as head of the Archivist Corps and reported directly to Turaga Dume.
Ga-Koro Kolhii Field
The Ga-Wahi lily pad on which Hahli and Macku trained for the Kolhii championship the Ga-Koro team eventually won at Ta-Koro.
Ga-Wahi Beach
The shoreline outside Ga-Koro where the Toa Metru first set foot on Mata Nui, later flattened by the Bohrok swarms during their reawakening.
Keras Crab
A large coral crab Rahi native to the ocean of Ga-Metru and the reefs of Ga-Wahi, briefly tamed by the Ga-Koro Defense Force during the Bohrok War and later mutated into the standing infantry of the Barraki Carapar in the airweed fields of Mahri Nui.
Kolhii
Kolhii was the inter-village athletic contest of Mata Nui, descended from the earlier Akilini of Metru Nui and played by all six Koro until the island's evacuation.
Kolhii Champion
Title granted to the Matoran selected by their Turaga to represent each Koro in the post-Bohrok-Kal Kolhii tournament on Mata Nui.
Mata Nui Military
A decentralized network of village militias defended the island of Mata Nui through the eras of Rahi unrest, the Bohrok War, and the Rahkshi incursions.
Mavrah
A 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.
Onu-Koro Kolhii Stadium
The underground Kolhii field cut into the galleries of Onu-Wahi, home venue of the Onu-Koro Kolhii Team of Onepu and Taipu.
Onu-Koro Kolhii Team
Onepu and Taipu were Onu-Koro's Kolhii pair at the Mata Nui championship, beaten in their opening fixture by the Ga-Koro side that went on to take the title.
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