The RDA wanted a perfect soldier of an Avatar and Na'vi of their own after they have left pandora, which led them to creating, and adding a DNA to which they called it Giff to awaken the user inner demon, a device called: Demon driver as well creating a spider stamps. A device that is said to allow the user to become an armor to the user while adding more like animal features to the user to give them more power on certain body parts like the animals part from said stamps. The downside is that the user needs to have an inner demon to allow the user to use the driver. They created many hybrids of their own, hoping that one of them would be able to use it, only to see that not many of them were able to use it. They were gonna call off the project of theirs, until code 001 was able to manage to use the Demon driver. They started creating more certain stamps for the Demon driver, meanwhile, 001 was having a chat with his inner demon, which he called Vail, taking about the situations they both in, to which 001 reply he knows and he is waiting for the right and perfect moment to strike and take not only the blueprint the RDA created, but the stamps and the demon driver as well. Which Vail said that he figured, seeing that he is his inner demon, so he knows what 001 knows, desire, thoughts, pretty much everything. When 001 saw the opportunity, he wasted no time to take it when the RDA let their guard down and least expected for 001 to take the driver and transform into Kamen Rider Demon, before killing, destroying the place, leaving no trace of evidence behind after having a copy of the blueprint and taking the stamps with them as well. They then quietly escape by boarding on the ships that were heading to Pandora, thus starting an adventure and journey they have now started.
2 parts