User blog comment:Codgod13/Bonus Round: Father Alexander Anderson vs Vergil/@comment-4661256-20120610214312/@comment-4661256-20120610215926

Alucard was a vampire, which is completely different from a demon. Physical matter (like Alucard which is just a powerful animated corpse) is quite capable of dealing damage to physical matter (like Anderson, who is a human, or semi-human or whatever he is). Demons, like Vergil, are nonearthly entities that are of a substance other than material. They can choose to assume material substance but then, they lose a tremedous amount of their evil power once they choose to mimic the form of something created by God. Therefore, either Anderson can simply exorcise an invisible Vergil or else Vergil can assume physical matter and be defeated extremely easily.