Who is Arpad Kovacs from Mother Night and what is their importance?

Arpad Kovacs is the third man who guards the narrator. He is on duty from 6:00 p.m. until midnight. During the war, he was a Jew who did not give in quietly to the demands of the Nazi's. He was living in Hungary at the time and secured fake papers and joined the Hungarian S.S, one of the most fanatical wings of Nazism.