the orphanage

[Karellen]

From what I remember (If I remember more I'll say) the hints are around. One of which being Irvine being unable to shoot at the correctly planned moment, that is because he knows about the past more than the others. His claims of "cracking under pressure" in clearly a cover that any morron could work out (Hey, I worked it out didn't I?) the pressure of "history" is nothing, and it wouldn't have made history anyway, all people care about is assanations never who's done them. He is dillbertly acting OOC and Square know it.

The game gives the player no reason to question the validity of Irvine’s nervousness at that point in time. There is nothing in the way he delivers his lines that implies that he is lying, nor does Squall question his sincerity either. If they player doesn’t consider his explanation particularly believable, there is no reason for the player to jump to anything beyond “the writers gave him pretty lame motivations”.

Another is in the D-District Prison. A reminicent moment after Squall saves Zell, someone who he is hardly suposed to know at this point, as they have hardly interacted at this point. This is further notable as Sqaull is still in his "keep to self" stage at this point, further break in character moment, also this could be a start of Squall changing aswell, but you can see the nostaliga forming.

Is this the scene in question? (script taken from gamefaq.com)

Meanwhile...

Guard: There he is! Over there!!! Seize the escapee, dead or alive!!!

Zell: Tch! Too many! I'm outta here!

Zell moves on but is struck by someone.

Zell: Ugh...

Warden: You bastard... DIE!!!

Suddenly, Squall came up and killed the Warden with his gunblade.

Squall: Didn't think he'd go down that easy.

Zell: Squall!!! Thanks, man!!!

Squall: W-What!? Let go. I said, let go!

I don’t see anything there that could be called reminiscing. If this isn’t the scene you’re talking about you’ll have to point it out to me.

Also it is stated in one of the FE pages that the characters have a past dream (Ellone's) about the orphanage, this is hint threw expressinon and this is how Sephie was able to guess before Irvine said about the orphanage, I can't remember where this takes placem I'll check later.

The only scene before the orphanage plot twist that actually involves the orphanage in any shape or form is a scene involving Squall (and only Squall) as a child. Only, there is no way to tell from the scene that it’s set in an orphanage and indeed the only thing one can take away from the scene is that Squall had a (at this point unnamed) sister (‘Sis’, later revealed to be Ellone) who apparently left him.

Shortly before the parade when Rinoa's dad is explaing what to do, he mentions Edea's name - this is the first time we, and suposedly the characters have heard "The Sorceress" being called by name. But Sqaull thinks to him self about the name, and through expression, it's obvious he's heard it before somewhere...

Once again, from the FFVIII gamescript:

General Caraway: I'm sure you know about the Galbadian government
reaching an agreement with sorceress Edea.

Squall: (So the sorceress' name is Edea...)

General Caraway: There is going to be a ceremony tonight to commemorate
the event.

Squall: (Edea...)

This one is probably the most substantial example that you’ve given. That being said, it doesn’t point to anything beyond Squall possibly having heard the name Edea before. Foreshadowing of the orphanage scene would have required at least a subtle clue as to their being a link between the protagonists. Squall’s musing over Edea’s name doesn’t imply this in the slightest.