Aarenis is an area of the northern continent south of the Eight kingdoms. It is bordered to the west and north by mountains (the Westmounts and Dwarfmounts, respectively) and to the east and south by seas (the Eastern Sea and the Immerhoft Sea). Aarenis means "daughter of Aare", a name given by the immigrants from Old Aare that came across the Immerhoft to the area in mainly two waves (the last being shortly after the fall of Aare).

Aarenis contains four feudal domains claiming lineage back to old Aare, the counties of Andressat at Cilwan and the duchies of Immer and Fall. In addition, the area contains a lot of free cities, of which many are under the control of the Merchants' Guild.