Assuming we are to rule over our sin my CS should be fine. Map wise I imagine simply any combination of cardinal directions for parts of the kingdom, probably just north and south for now, maybe adding stuff later. More specifically perhaps the north could be cold and the south fire? If we have the souls of the dead perhaps the cold is simply for the apathetic ones and the fire is for the malicious ones.

Human Name: Neven
Demon Name: Kosdar
Spouse of: Havennah
Position Given: Overlord of the North(winter is coming)
Sin to Rule Over if any; Pride