Originally Posted by
Petrikow
I went back and looked at some conversations from Melty Blood, since it came up again.
Vlov's story got me thinking.
Obviously we already had this conversation at some points, but it is really made abundantly clear that Arcueid possesses a Principle. The so called "Principle of the Extremum" (極点の原理).
What's more, Vlov wants to consume it for himself, partially as a petty act of vengeance towards Roa, but also to "overcome his starvation". At the end of his story mode, he succeeds in defeating Arcueid, but realizes that taking in her Principle has done nothing to help with his ailment.
The question is once again... how do we relate this to Idea Blood? I think we can by now be fairly certain that Idea Blood is something possessed only by the 27 Ancestors. And once again we have to confront that statement about how Idea Blood = Principle. Yet Arcueid is not one of the 27. Perhaps this is pointing towards finalizing the idea that whilst Idea Blood is some type of Principle, not all Principles are Idea Blood. Still, isn't it interesting how Roa says Principles cannot be passed on, yet that is seemingly what Vlov tries to do with Arcueid? The only saving grace here is that Vlov seemingly doesn't change upon killing her. Perhaps this is simply a case of Vlov being mistaken in his belief that consuming Arcueid would let him get her Principle.