DXD: all the worlds evil

is it true that one man can hold all the worlds evil

apparently so since that has happened to me and now I'm cursed to walk a path of death and despair

well I might have been if I had not meet Sirzechs at a young age and was adopted by the gremorys

now the pawn of Sirzechs i hunts strays and traitors to the devils

but now i meets rias when she returns to the underworld with a new pawn...I wonder who this new pawn is?