It's probably too late, but...

[Catapult]

I think the echo reenact an interactive past, not the real past. Thus, you are able to interact with people there. Kind of like a fake past vision in the present. Right? Wrong?

I kind of just threw this off here... with alcohol in my body.

From what I've been able to gather, this is not the case. How else would Thancred/Y'shtola/Papalymo know who you are in Futures perfect?

What we have been told is:

As was stated above, all three have the power of the Echo, allowing them to experience the past, interact with it, but ultimately not change the outcome of anything important (the wind created by a battleaxe swing will not start a hurricane in Garlemald).

Saying that we cannot change the outcome of anything important implies that we can change the outcome of things that are unimportant. Such as memories, for instance.

I personally hold the theory that the ability to change lots of little unimportant things ultimately causes something important to change in the course of the Gridanian Main Scenario - namely the purification of Dunstan at the Grand Rite where it should have not been possible.

If you run the Ul'dah line, Minfilia also discusses in Fade to White how she believes she has found another who witnessed Nielle's last moments in the Crypt - she, Ascilia, was originally the only one there. But her memory has changed. That is an interesting twist in history.


Ferne is welcome to correct me, but I suspect he won't, 'cause of spoilers...