Formally known as "Joint Automatic Debugging, Diagnosis, and Repair Sub-sytem Bifrost", it is a top-secret debugging program exist to find and repair Sybil System's flaw during its early development state. Investors of the system used their position to make the system as its own unit, capable of exploiting Sybil's flaw to make profit, this gave birth to the Congressman assembly. ~!The system is effectively dissolved by Sybil's System when Homura appointed Sybil System as one of the Congressman.!~
