The Toa Kaita Nuva were two distinct beings who could have been formed by the merging of the six Toa Nuva. Although the potential for such unions existed, only Wairuha Nuva was ever formed.
The Toa Nuva were able to merge their bodies and minds to form the Toa Nuva Kaita [sic].
When Lewa Nuva, Kopaka Nuva, and Gali Nuva formed a Toa Nuva Kaita [sic], Gali closed her eyes, gathering and focusing her energy. She concentrated on the other two Toa Nuva, allowing her own mind to flow and merge with theirs. A moment later, the Toa Nuva Kaita known as Wairuha opened his eyes. Created from the mental and physical uniting of the three Toa, he combined their powers into one form.