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The Anole lizard, like most of its species, has the ability to regrow its tail if it is attacked by a predator.
Named after the lizard, the Anole Project is a system that takes people who have attempted suicide and turns them into a human machine to fight against the common enemy, the Metanere.
The Anole Project puts these specific people under severe climate and environment testings and whatever is lost or fails, whether it be your leg or your lung, it is replaced with a super powerful metal, Poeirlloid.
These people are trained to adapt with their new limbs or organs and then stationed on the front lines, to finally push humanity to victory and take back the land the Metanere have taken.