[ Astarion's head tilts to the side as he considers the conundrum. The spirits can't be from the people currently trapped within the city, as no one is actually able to die. But no one has been able to find any evidence that there was any one here before them, either. ]

They may have simply done a very thorough job cleaning up, [ Astarion suggests. ] Or, I suppose they could be importing spirits from other realms. After all, they imported us.

[ It is an odd thought, though. Trafficking in souls is the purview of gods, not mortals. Is that what they're dealing with here? An unnamed god? Or merely someone empowered beyond measure by one of their stock? ]

Perhaps if we had a necromancer on hand, [ Astarion says, a touch wistfully, ] we'd be able to get some answers...