okay hear me out, aren't devil arms the souls of demons that became wepons? They show evidence of this in every game(excluding DMC2) so wat if after Dante deafeated nelo Angelo in DMC1 he became a devil arm but instead of just becoming a wepon he needed to fuse with someone since he's half -demon and he couldn't fuse with Dante since he has the same blood so he needed to find someone else so when he saw Nero he thought of himself trying to protect his mom so he wanted to give Nero the power he needed but he could only enter thru an open wound and the only one was his arm. It was shown in DMC3 that demons reatain concioussness when a devil arm if they are still alive when they become one, shown in the "no talking" scene from DMF3 which would explain Nero hearing vergils voice. So what do u guys think?