

As such, the bio-boosted human was named 'Guyver' (a word meaning "out of control" in the Creators' language, though other versions give it as "beyond the norm" and Bio-Boosted Armor Guyver gives the meaning as "not to specification"). The newly-created creature turned on the Creators and even destroyed one of their ships. The results were astonishing, but the newly-developed psionic shielding liberated the human subject from the Creators' control. The first Guyver (labeled "Guyver-0") was the result of experimentation conducted by the Creators eons ago on the effects of the Guyver unit that had successfully bonded with their newly developed weapons. Guyver I has demonstrated the ability to regrow approximately 50% of the host's brain and skull in a matter of minutes. It is presumably also this semi-sentience that prevents the host from disengaging the armor if they have sustained injuries that would prove fatal without the Guyver's protection and ability to rapidly heal from damage. Guyver I demonstrated this function after its host (Sho) was left unconscious follow the bonding process, when he was regenerated by the Control Medal in Chronos Japan Headquarters and when he killed the Zoanoid his father had been turned into. In this mode, it usually acts only in self-preservation towards a perceived threat. The Guyver was used by the crew of the Creator's spacecrafts and in later chapters, Sho used his Control Medal to speak telepathically with the Relic itself.Ī Guyver Unit itself is semi-sentient and can act on its own in a limited capacity if its host is unable to consciously control it. Unlike the Zoanoids, the Guyver is humanoid in form - mostly because all known hosts are human. This device actually deletes the host data from the Control Medal's records, forcing the bio-boosted armor back into it's stasis mode The condition of the human host after the process remains unclear.

The most effective tool to counter an activate Guyver however, is with a weapon known as the Unit-Remover, developed by the Creators. A seasoned, battle-tested Zoalord also possesses the raw power necessary to destroy a Guyver, as do some Hyper-Zoanoids.

Guyver Killer-type Zoanoids, for example, were specifically designed to secrete a corrosive chemical compound capable of dissolving the bio-boosted armor.

While extraordinarily resilient, an activated Guyver can still be damaged, even destroyed with the proper tools. This led to the naming of "Guyver", which in the Creators language means "Abnormal", "Non-Standard", &/or "Out of Control". Besides increasing the powers of a human being when he/she wears it (more than when the Creators themselves wore the armor), it also frees them from the will and telepathic commands of the Creators themselves. Although classified as armor, the G-Unit also changes many aspects of the hosts biological system, including the removal and rearranging of organs. The Guyver Units were designed as an all-purpose environmental suit for the purposes of the Creators (believed to be a group of aliens of different species).
