Personally I would love seeing Raziel or Kain :P. Awesome story in those games and excellent voice acting.

Would be curious to see how Raziel would act in a world like this aswell since he needs to sustain himself. Since he is generally a good aligned character so might be causing him alot of problems when facing the possiblity of having to devour some people whom are not nasty. Unless he specifically go chase after criminals that is :P