The Master's real name is Cyril Ulrich, and he used to be a vigilante who tortured criminals until they no longer desired to break the law. The government forcibly recruited him to continue his work, but only with the people they send him. He is secretly just as trapped as the people he tortures, as the government has deemed him too dangerous to let go. Cyril has become accustomed to living in the Bunker, but if given a chance, he would escape. He stays in a small apartment in the Bunker, and doesn't actually know where the exit in the Bunker is. The entire Bunker is filled with knockout gas before they drop off the next inmate, and again when they come to pick someone back up.

The Master has lived there for 26 years, and has tried to escape hundreds of times, usually by impersonating a broken inmate. It never works. Cyril is 49 years old, and has lived in the Bunker since he was 23.