Devils literally only want your soul though. Their one and only ambition is to rise in power in the hells, and to you; that means your soul as a soul coin.
Im sorry, but i believe that is not entirely true ...
Devils want any soul ... and since we allready know that we will be able to get our hands on at least one soul coin ... if you know what i mean.
Raphael snu-snu box ... please insert coin.