Arepach: One of several demons associated with the points of the compass, at least according to the Ars Theurgia. Arepach serves in the hierarchy of the demon-king Raysiel, who rules in the north.
Described as having a particularly stubborn and evil nature, Arepach is a demon of the night, only manifesting during the hours of darkness from dusk until dawn. He holds the rank of chief duke, and accordingly has a twenty other lesser spirits under his command.
SOURCE:
The Dictionary of Demons written by Michelle Belanger