The Inquisitors are an order who's origins are unknown. Whether lost to history or deliberately kept out of it, very little has ever been discovered about the mystical group. What is known, however, is that they emerged from secrecy when Sansha's Nation began to invade Empire space with their dogmatic ideas. This must have had an affect on the Inquisitors because they discarded the shadows to drive back the Sansha's advances with zealous devotion.
It is also known that when the Inquisitors emerged, many of them were capsuleers among all factions and areas of space, with seemingly no relation whatsoever prior to the shedding of their allegiances. It is commonly believed that many are still hidden, possibly to provide assistance to the cause from within their factions and corporations.
There are many rumors, including that which states that Sansha Kuvakei was part of the order himself, but because of his ideals was excommunicated. Of course, nothing can be confirmed because there have never been any records to show this.
Acedemia Inquisita is considered to be founded to train new Inquisitors who are acknowledged by the public to aid in the fight against Sansha's Nation. Whether these trainees genuinely become part of the order is unknown.