Toshiaki Hayami

Toshiaki Hayami was a supporting character from the anime/manga series Guyver: Bioboosted Armor. First appearing in the manga's fifth volume, he was a Cronos scientist who worked in the lowest levels of Relic's Point. However, he held no allegiance to Cronos and is believed to have been forcefully indoctrinated into the organization. Hayami and the other basement scientists were tasked with researching the bio-technology of the Creators, alien beings responsible for engineering life on Earth eons ago. Rather than use the Creators' technology to further Cronos' goals, Hayami and his colleagues plotted to bring Cronos down from the inside.

History
Hayami was a Cronos scientist who helped study the bio-technology of the Creators at Relic's Point under Dr. Yoshio Odagiri. Odagiri and his research team were in fact conspiring to bring down Cronos from within and pledged their support to Sho Fukamachi and his friends by sheltering them in the lowest levels of Relic's Point, right under the noses of Guyot Commander Guyot and Barcas Dr. Barcas.

When Hayami and his colleagues had been forcefully inducted into Cronos, they had been administered a virus that increased their mental acumen. Of course, the virus was also fatal and served to keep the scientists under Cronos' control. Cronos provided the scientists with regular shots of an antidote to keep them alive, since the only alternative means of eliminating the virus was to undergo Zoanoid processing, which also meant surrendering to the psychic domination of the Zoalords.

Following the destruction of Relic's Point, Hayami and the other scientists (excluding Odagiri who had been killed by Guyot) were forced into hiding. While Cronos achieved their goal of world domination, Hayami and the others spent their time and resources trying to discover a cure for the virus before their supply of the antidote ran out. Unfortunately, time soon ran short and Zoanoid optimization became their only hope of survival. The process was skewed, however, in order to produce Lost Numbers: creatures that possessed abilities beyond the norm for standard Zoanoids and were not subject to Zoalord mind control. The optimization process was extremely dangerous but Hayami and the others understood the risks and chose to undergo the process. Sadly, Hayami himself was the only one to survive optimization.

Following his optimization, Hayami - who would become known to Cronos as Bio-Freezer based on his freezing powers - reunited with the Guyvers and their companions, which oddly enough now included the rogue Lost Number Aptom. The addition of Lost Numbers to the Guyvers' allies was cause for great concern to the Zoalords, who organised an operation to reclaim control of Aptom. The Zoalord Khan Cabraal Khan devised a plan to attack the Guyvers with a Zoanoid implanted with the DNA of a Zoalord (specifically his own DNA). Aptom absorbed this Zoanoid and Cabraal's DNA, making him subject to his control. Under Cabraal's influence, Aptom killed Hayami. Before Hayami died, however, he made one last use of his power to immobilise Aptom, giving Sho the opportunity to free him from Cabraal's control.

Zoanoid Data
Bio-Freezer's combat ability is somewhat lacking compared to a Guyver or Hyper-Zoanoid. His major advantage, of course, is his ability to release bursts of supercooled helium over a certain radius, freezing enemies in their tracks. The drawback to this power is that it takes time to produce the helium burst, leaving Bio-Freezer vulnerable to attack while he is preparing to fire. As such, Bio-Freezer must plan the timing of his attacks carefully to make the best use of them. His power has proven to be highly effective against III Enzyme III.