This infantry is unique to Pacific Front.
After several exhausting battles against the Chinese divisions, the Pacific Front forces have taken big losses to their armored and infantry forces. Losses taken were so severe, that the scientists of Kanegawa Industries desperately attempted to find a way to increase survivability rate of their troops. However, several events enforced them to delay the research on a certain experimental weapon for long time.
Finally, answer came with an improbable new equipment, named the "Negation Field". This device was capable of reverting the destructive nature of every projectile to point, where attacking would simply heal the target - with an opposite result for any repairing or healing tool. After several tests and positive results of this new weapon's efficiency, Negation Fields in compact form have been given to soldiers on armored hoverboards. Those, who mastered the potential of this tech have been named the Suppressors.
The technology behind the "Negation Field" remains a mystery. Some of the Pacific Front's enemies speculate that it is based on previously undiscovered Einstein's chrono research, which wasn't completed due to his death. What is known is that the Suppressors quickly earned their fame in battle, and now are favourite support units of many Pacific Front commanders, capable of fighting on both land or water and supporting frontline assaults with great results. Whenever there are Suppressors on the field, the casualty ratio for the Allied troops is ensured to stay low.