is necron from terra?

[Zeromus_X]

One thing I notice is that Necron blathering about a "zero world" sounds a lot like Seymour's belly-aching about "without life there is no suffering...let me end your suffering..."

A trend?

Nihilistic antagonists and/or final bosses are most definitely not uncommon in the final fantasy games. Although most final bosses in the series did want to destroy everything (and usually were some sort of deus ex machina 'essence of darkness' force of nature), they really didn't have much character until Kefka in FFVI (who wasn't really developed all too well anyway), developing even further with Sephiroth (here we go) and Ultimecia (okay, now we got it). Of course, Necron's name in the Japanese version of FFIX is 'Darkness of Eternity', which he even says in the english script. He's just a deus ex machina/nihilistic final boss, yet another tribute to the older final bosses of the series, and the series besides, in FFIX.

There really isn't much more to it than that. You can speculate all you want, and over-analyze things, but ultimately the answers to over-speculative questions people make up for a fictional video game are really quite simple. FFIX really isn't too tough to understand (which is actually a positive thing, at least to me) anyway, FFVI, VII, and VIII had much more symbolism than it did, though even all that was pretty simple to understand.

But, besides all that, (SPOILER)after Garland reincarnating himself as a giant winged demon master of chaos, the deceased Emperor of Paramekia rising up from Hell, the Cloud of Darkness appearing right after Zande was finished, Zeromus spawning his funkadelic blue spaghetti person out of Zemus' Meteofried dead corpse, Neo X-Death appearing right out of nowhere complete with a psychadelic metaphysical battle background, Kefka's tree of nameless demons and finally himself as an apocalyptic angel of death, Sephiroth similarly following shortly after, St. Ajora transforming into the Bloody Angel Ultima (I wonder if this is some sort of theme going on here), and finally Ultimecia and her wonderfully annoying five (or so) forms of surreal wonder, how could you honestly be surprised with a flying, angelic blue guy with spinny-nuclear-reactor rings and nostalgic cosmos-destroying super attacks and annoying status effects?

Basically, Necron is some sort of entity that exists to destroy everything.