Toa were heroes who served the Great Spirit Mata Nui, defended the Matoran and other innocent beings, and honored the Three Virtues: Unity, Duty, and Destiny. Traits which all Toa shared in common were the ability to use Great Kanohi Masks of Power, control of a single elemental power, and possession of a tool to focus that power. Toa commonly operated in groups of six, although smaller and larger groups were known to exist according to different circumstances. Certain Toa were known to have begun their lives as Matoran, while others were Toa for the entirety of their existence. Known means for Matoran to transform into Toa included the power of Toa stones (Toa Metru), donning the Mask of Light (Takanuva), and being struck by lightning from the Red Star (Toa Inika). It was unknown if there were additional means as well.
A Toa's power came from within himself or herself, but it was focused through his or her mask.
When the Toa [Mata] combined their elemental powers to defeat the Bahrag, the energies condensed into gel-like protodermis and formed a barrier around the queens, imprisoning them within.
Some Matoran, even on Metru Nui, had never met a Toa before. For example, the transport manager that Matau once met in Le-Metru had seen Toa a long time before but had never met one in person. Still, he had heard legends that Toa were meant to protect the Matoran and keep them safe, which encouraged him to trust Matau.
With extensive practice, Toa could learn to control and ration their elemental energies more efficiently. Otherwise, they could quickly begin to tire.
As far as Vakama knew, the legends said nothing about a Toa turning back into a Matoran. A Toa was a Toa until he fulfilled his destiny, but Vakama did not know what happened after that.
It was said that Toa were very wise and always had good advice to give.
To become a Turaga, a Toa had to fulfill his or her destiny and then willingly sacrifice his or her Toa power.
Toa were said to have a destiny to fulfill. Once a Toa fulfilled this destiny, he or she would at some point be presented with a great choice. If he decided to sacrifice his Toa power for the greater good, then he would be transformed into a Turaga, a respected leader of Matoran. If he chose to retain his power, he could remain as a Toa indefinitely. Toa were active on Metru Nui, on Mata Nui, and in numerous other lands. They faced numerous foes, and their greatest and most persistent enemies were the Brotherhood of Makuta and the Dark Hunters.
As a general rule, Toa were not good at sneaking. It went against their image of being proud and very public heroes.
Toa were able to teleport their Kanohi masks directly from suva to their faces.
Gali Nuva once remarked that it was against a Toa's nature to sneak, but rather to work in plain sight and inspire the trust of Matoran.
At the end of story year 2008, Tahu Nuva was in overall command of all surviving Toa in the universe.
The most important part of the Toa's code was never to kill their enemies.
The maximum number of Toa ever in existence in the universe at one time was 3,000. As of late story year 2006, there were fewer than 50 left, due to the hazards of the job. This number would have included the six Toa Nuva, Takanuva, the six Toa Inika, Lesovikk, Helryx, Chiara, Orde, Zaria, and Varian. It may have included Krakua. This means that the maximum number of Toa not encountered in the story at this time was 49 - 6 - 1 - 6 - 6 = 49 - 19 = 30.
A Toa's powers were tied to his spirit; a spirit inhabiting a Toa's body would not have access to those powers.
"Toa" meant "hero." A Toa turned evil would no longer be considered a Toa.
After the move to Spherus Magna, it was still possible for new Toa to be created. If a Matoran was destined to become a Toa, then it was still possible for other Toa to invest power in Toa stones to trigger it. In Lhikan's case, he created multiple stones at once, which is why it affected his power. That was not normally how it was done.
A Mask of Light was not required to make a Toa of Light.
The artificial intelligence of a Matoran played a role in his or her transformation into a Toa, since it had to change in certain ways, as well as to enable the Toa to control Great Masks, wield elemental powers, and so on. If the artificial intelligence was switched out, as in Velika's case, then transformation into a Toa was not possible.
A Toa who lost his mask would become extremely sluggish and weak.
It was possible for only two Toa to merge into one.
A Toa was 1.6 bio tall.
- Toa of Fire merged into Prototype
- Toa of Earth merged into Prototype
- Toa Mata/Toa Nuva
- Toa Metru/Toa Hordika
- Toa Hagah
- Toa Inika/Toa Mahri
- Toa Mangai
- Toa Cordak
- Jovan's Toa team
- Savage's Toa team
- Spinner's Toa team