Abraham Gray

The floor master of B2 and a reverend who created this facility as an experiment to determine the definition of "religious faith," including gathering all the various floor masters and providing them with victims. He is extremely eloquent, able to mesmerise his listeners through words, and harbours a cold and logical heart without mercy. Grey also employs the use of drugs to make his victims hallucinate in order to see their true inner selves.

(Source: Wikipedia)