Downfall

Downfall is a terrorist organization bent on world domination and the main antagonists of the movie Kamen Rider Build NEW WORLD: Kamen Rider Grease.

They are led by Simon Marcus, a Deputy Officer of the United Nations, and their personnel includes mad scientist Keiji Uraga. For an unknown reason they have access to the Guardian robots manufactured by Namba Heavy Industries Ltd. in the old world as well as the Build Driver.

They emerged some time after Killbus was defeated and the rest of Team Build got their memories restored. They kidnap Misora Isurugi for reasons unknown, causing Kazumi Sawatari to fight them.

History
to be added

Members

 * Simon Marcus/Phantom Crusher
 * Keiji Uraga/Kamen Rider Metal Build
 * Guardians
 * Hard Guardians