Smart Brain is a company that is a front for a group of Orphnoch that sees themselves as the master race & are dedicated to the extermination of the human race & increase of the Orphnoch population. They experiment in making their race even more powerful & developing weapons that only Orphnoch can use. Smart Brain is ironically where the Rider Gears were developed from. This is the largest coordinated group of Orphnoch ever seen, & near the end of the series, they seem to have formed a de-facto world government after the Orphnoch revolution.
- Smart Brain - counterpart at Kamen Rider Wiki