The E.R.A (Elite Robotics Alliance/Elite Robotic Assassins) is a company founded by Naozumi as a cover so he could test out various experiments he had in mind to create the best army possible.
On the surface, the company manufactured gears and various electronics components to the world. Inside however, the most horrific, twisted experiments took place, mostly against what most of the workers were content with doing. Such experiments include:
-Creating the E.R.A Droids
-Partly creating PROJECT:LIBRA