By manipulating the "God Arc" which incorporates the same "Oracle Cell" as humanity’s natural enemy Aragami, they are the only ones who can defeat the Aragami. They are the last trump card of humanity
A person who becomes a GOD EATER is not just able to pilot the "God Arc" but also shown a significant improvement in physical and regenerative ability. They exert a superhuman performance.
Only those who passed through the adaptability test for administering "Bias Factor" of "Oracle Cell" origin is qualified to be a GOD EATER; however, even after the adaptation, they are required periodic administration of "Bias Factor" from their right-hand bracelet.
Mysterious creatures that suddenly appeared in the early 2050s and began to devour the entire world.
Because of the "Devour" ability, conventional weapons have been fallen flat against them. Humanity lost the majority of its population in a short period of time and civilization was cornered to the verge of collapse. In 2071, the presence of various form of Aragami, from small to large, has been confirmed but many of its ecology are still shrouded in mystery.
Anti-Aragami Armament which was developed in a few years after the Aragami’s manifestation. God Arc is a biological weapon that has been built in the same "Oracle Cell" with Aragami. Only human beings who are adaptable with the God Arc, aka God Eaters, can wield it. There are different types of God Arc, such as melee type of sword form and long-range type of gun form. Also the development of the next generation variable form type of God Arc has underway.