DreadnoughtDT;196376 said:^ WOAH! Okay, I get it now. Here's my new theory though... What if the DB we see in DMC 4 is immature? Perhaps as it grows, Nero gets less and less human... Maybe one day turning into a pureblood demon, like his DA. Look at the DB and the DA's left arm... They look exactly alike, minus the huge claws.
The huge claws you see is the sheath actually.
Anyway, about your assumption... well, that's a theory.
I personally think he's already a pure-blooded demon. He also tells to Kyrie in the end... What If I'm a demon, and a human anymore... He's feeling a pure demon already.