Once you beat a demon you'll be able to form a pact with him which allows you to play in his human form. There is a catch of course: it costs $2.99 of real money to form a pact and unlock the character.
Eve and her comrades land on the surface to reclaim the extinct Earth and cross paths with a survivor named Adam. Eve is then led by Adam to the last surviving city, Xion, where she meets the elder of the town Orcal and is told many stories. In order to serve her mission to save Earth, Eve develops close relationships…