Chakravartin

The Chakravartin was a major event in the universe of Kamen Rider Nio, in which the Old World was somehow destroyed and replaced by a different reality more akin to modern-day Japan. The general populace has no memory of it or the Old World entirely, though as a result of it the energy known as karma now permeates all things, giving rise to the phenomenon of Asura, Deva, and even Kamen Riders.

The Order of Rakshasa, an organisation of asura, claims to know the truth of the Chakravartin, but to have no knowledge of its mechanism or the solution to it. Their search for the Demon King of the Sixth Heaven appears to tie into their goal of reverting it; though they also assert that they aim to prevent it from happening again.

Members of the Kane Shrine and other Deva, on the other hand, believe that the Order winning will provoke, rather than prevent, another Chakravartin.