The ERASER (Eradication and Removal Automated System by Enzymatic Reaction) is an unusual weapon whose development was spearheaded by the Red Arms Medical Corps. It was necessitated by the powerful external defense mechanism of the Breach Creatures in the Axion Plains.
The Breach Creatures and the Breach Cluster Sacs that control them had an adaptive defensive mechanism that enabled them to adapt to the damage they receive and increase their resistances accordingly. Thanks to the Medical Corps and Dr. Kate, who collected and studied biosamples from the Breach Creatures, it was possible to create an enzyme that could reverse the immune response.
The problem was there was no effective way to deliver the enzyme to the targets. To solve this problem, they used a support gun that had been designed for the Medical Corps' decontamination work. Originally designed to hold chemicals for decontamination and spray them over a wide area, this support gun was specially modified to hold the enzyme in a stable state and spray it on the target location. It was now possible to completely eradicate organic matter over a targeted area.