Ellone = Cyborg = Ellone = Rinoa?
But Ellone is Squall's half-sister, so that means Squall and Rinoa ( Ellone ) have a little Luke and leia thing goin on...ew...
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Ellone is not a cyborg.
Little Ellone and Rinoa are one and the same person.
The adult Ellone we see on the game is not her but a cyborg imitation.

And they weren´t brothers nor half-brothers.Where do you get that?

Zell is controlling Squall, then who is controlling Zell? The dog that hangs with them?
Quistis wanna teamwork so hard that she sents Zell´s consciousness into Squall´s mind.
Zell wannas Squall to run faster to the ship.

So he imagined Squall running faster.
But it wasn´t imagination.He really was inside Squall helping him running faster.
Would it not be for Zell he might be dead by now.
It was too quick for them to realize.

XATMO scanned Squall´s central nerve system and making some adn-like and mind-like calculations realized that the electrical current pattern running on Squalls brain is not his but that of Zell.It then created the picture of Zell.

I can show this with screenshots.

Those points actually makes sense, coincide with the story, and fit perfectky into the game.
Myne´s also.