Kaita: the Fusion of Three

A Kaita was a being created by the fusion of three separate beings into one. When the three merged, they became a single being with its own mind, a single KanohiKanohiMasks that grant powers and sustain life, they're the most vital artifact in the Matoran Universe. and combined powers, stronger, faster and smarter than its parts working together. The best known were the ToaToa (2001)Biomechanical heroes bonded to elemental powers and masks. Not born, but chosen and transformed. Kaita AkamaiAkamaiAkamai is a Toa Kaita and member of the Toa Nuva, formed from the combined essence of three Toa, who serves as a guardian of the Matoran. Born of Artakha, Akamai wields the Great Aki Nuva and commands enhanced powers of Fire, Stone, and Earth alongside Enhanced Valor, and carries Magma Swords, a Kodan Ball, and Feet Additions into battle, clad in red, brown, and black. and WairuhaWairuhaWairuha is a Toa Kaita and member of the Toa Nuva, native to Artakha, who serves as a Guardian of the Matoran. Wearing the Great Rua Nuva, Wairuha wields enhanced powers of Air, Water, and Ice alongside Enhanced Wisdom, and carries the Air Katana and Aqua Axes., formed from the Toa MataWho are the Toa Mata?Six warriors built to order by Artakha, stored in canisters, dropped into the ocean. This is the origin story of Bionicle's heroes and why their first week of work was entirely amnesiac.. (BIONICLE Chronicles 1: Tale of the Toa; Mata Nui Online Game)

The nature of fusion#

A Kaita was not a team but a single being. When three Toa fused, their strength, speed, knowledge and personalities were combined in one body, so the Kaita was more than the three of them fighting side by side. It could also use all three elemental powers, and use them together. (BIONICLE Chronicles 1: Tale of the Toa)

The fusion wasn't automatic or permanent. A Kaita stayed whole only as long as it kept the focus of the fusion, and when that concentration broke, it fell apart into its three components again. (BIONICLE Chronicles 3: Makuta's Revenge)

Toa Kaita#

A ToaToa (2001)Biomechanical heroes bonded to elemental powers and masks. Not born, but chosen and transformed. Kaita was the fusion of three ToaToa (2001)Biomechanical heroes bonded to elemental powers and masks. Not born, but chosen and transformed.. The Toa Mata formed two, named in prophecy as Valor and Wisdom: AkamaiAkamaiAkamai is a Toa Kaita and member of the Toa Nuva, formed from the combined essence of three Toa, who serves as a guardian of the Matoran. Born of Artakha, Akamai wields the Great Aki Nuva and commands enhanced powers of Fire, Stone, and Earth alongside Enhanced Valor, and carries Magma Swords, a Kodan Ball, and Feet Additions into battle, clad in red, brown, and black., made from TahuTahu, Toa of FireTahu served as Toa Mata, Toa Nuva, and Toa Mistika of Fire, leading his team from the first landing on Mata Nui to the destruction of the Rahkshi army on Bara Magna., OnuaOnuaOnua was the Toa Mata and Toa Nuva of Earth, a quiet, deliberate warrior whose patience and underground mastery anchored his team across the Matoran Universe. and PohatuPohatuPohatu was the Toa Mata and Toa Nuva of Stone, guardian of Po-Wahi, whose speed and steady humour anchored the team through every era of the Matoran Universe., and WairuhaWairuhaWairuha is a Toa Kaita and member of the Toa Nuva, native to Artakha, who serves as a Guardian of the Matoran. Wearing the Great Rua Nuva, Wairuha wields enhanced powers of Air, Water, and Ice alongside Enhanced Wisdom, and carries the Air Katana and Aqua Axes., made from KopakaKopakaKopaka was the Toa Nuva of Ice, the loner of the Toa Mata, and one of the six warriors created on Artakha to protect the Great Spirit Mata Nui., GaliGali, Toa of WaterThe Toa Nuva of Water and conscience of the Toa Mata, whose attunement to her element anchored the team across every campaign from Mata Nui to Karda Nui. and LewaLewaToa of Air, member of the Toa Mata and Toa Nuva, whose career was marked by repeated possession, body theft, and aerial campaigns from Le-Wahi to Karda Nui.. The two Kaita fought their way into Makuta's lair and beat the Manas there, then split back into six Toa. (Mata Nui Online Game; BIONICLE Chronicles 1: Tale of the Toa)

After they became Toa Nuva, the six formed Kaita again in their struggle with 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., and these Toa Nuva Kaita carried the combined mask and elemental powers of their members. The idea that the Toa HordikaToa HordikaToa mutated by Visorak venom into bestial hybrids, forced to fight their primal nature and hunt for a cure. lacked the mental focus to fuse comes from a later online answer by Greg Farshtey, not from the stories. (BIONICLE Chronicles 3: Makuta's Revenge; BIONICLE 11: A Matter of Time...)

Matoran and Turaga Kaita#

Fusion wasn't limited to Toa. In Trial by Fire, six Matoran merged into one larger Matoran, a Matoran Nui, showing that the villagers could combine their bodies and minds just as the Toa did. Smaller Matoran Kaita and Turaga fusions don't play a real part in the main stories. (BIONICLE Adventures 2: Trial by Fire)

Bohrok and Rahkshi Kaita#

The fusion principle ran through the swarm species as well. Two Rahkshi KaitaRahkshi KaitaRare fusions of three Rahkshi that challenged the Toa Nuva in combat, but only two were ever documented., Kaita Za and Kaita Vo, formed from the six Rahkshi Makuta sent after the Avohkii. They tore a path through Le-Wahi and ambushed the Toa Nuva there, turning Kopaka fearful and Tahu angry and draining Lewa with hunger, before Tahu dropped a rocky peak on them and they split apart again. (BIONICLE 15: Secrets and Shadows)

LEGO presented the BohrokBohrokHive-minded mechanical creatures designed to reshape worlds, the Bohrok represent a threat the Toa Mata never expected. Kaita as fusions of three Bohrok, rarely formed and only to deal with threats too tough for a whole swarm, and showed two combinations, Kaita JaBohrok Kaita JaA theoretical Bohrok Kaita comprising Lehvak, Kohrak, and Gahlok, capable of fusion in principle but never assembled during the active swarm period. and Kaita ZaBohrok Kaita ZaA Bohrok Kaita Za was a theoretical fusion of a Tahnok, a Pahrak, and a Nuhvok, controlled by a Krana Za and wielding fire, earth, and stone. No Bohrok Kaita Za was ever formed in the events of the Bohrok swarms.. Three 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. could likewise merge, and Kal Kaita JaBohrok-Kal Kaita JaBohrok-Kal Kaita Ja was the merged being formed by Kohrak-Kal, Lehvak-Kal and Gahlok-Kal, wielding Magnetism, Vacuum and Sonics, which beat the Toa Nuva Kaita Wairuha Nuva with a vortex of their combined powers. was formed to bring down the Toa Nuva Kaita Wairuha, while Kal Kaita ZaBohrok-Kal Kaita ZaA possible fusion of Tahnok-Kal, Pahrak-Kal, and Nuhvok-Kal that was never formed on Mata Nui during the Bohrok-Kal campaign. was the other known combination. (Bohrok Kaita; BIONICLE 11: A Matter of Time...)