Well, if we're going by Nasuverse
rules as a whole, there is no such thing as "un-killable".
Just depends on whether or not your brain breaks in the process of "comprehending" the conceptual death of something which, on the surface, shouldn't have one.
Theoretically, of course.
There are always exceptions to just about every metaphysical "law" in the Nasuverse
And I'm willing to bet Alucard would be more than willing to destroy the Earth in that situation.
Ah yes...but "destruction" and "kill" are two separate
concepts. You can only kill Arcueid if you destroy the concept
of her existence, which is tied to that of the earth. If you blow the world up (or something similar), that concept is still intact, it's just not expressed.
edited 12th Apr '10 9:05:00 PM by zeroplusalpha