I've been wondering... who killed Aeris? Was it Sephiroth or Jenova? Right after stabbing her, he flies up and becomes a small thingy, and lands at Cloud's feet while the screen goes red. Then there's a boss battle with Jenova.

At the Northern Cave, Tifa even says: "Not Sephiroth!? You mean all this time it wasn't Sephiroth we
were after?"

The real Sephiroth was that one encased in Mako, and everyone else were just his clones... right?

If that's so, than why are big Aeris fans complaining that it was Sephiroth's fault she kicked the bucket? It wasn't really him was it?

God I ask a lot of questions