Es is a no-nonsense character with an unshakeable commitment to their role as Milgram's prison guard. They attempt to interact with the different prisoners humanely, and allow prisoners much more freedom and luxury than a typical prison would allow. Es usually has a somewhat deadpan and apathetic demeanor, but they have a short temper and sometimes lash out at uncooperative prisoners during interrogations. Es demands that all prisoners treat them as an authority figure, despite their age.