Secret reports HEAVILY imply mysterious girl x is actually Ava who had lost her memory and was experimented on.
She could be Skuld too.
SR1:
I had no answer to offer them. Four friends, and a
key...that is the sum total of my memory. I could not
even recall my name. I was simply called "X" there. My
only solace was the time I spend talking with the two
boys who would visit from time to time.
One day, a man came to take me from the prison. I
could not see him for the darkness, save that he wore
an eyepatch. Even now, years on, I feel no closer to
understanding who or what I am.
SR3:
Subject was found in the central square shortly after
dawn. Female, approximately fifteen years old. After
seven days' observation, she spoke her first words, but
could not provide a name. Subject exhibits signs of
profound amnesia, and displays concern about which
world this is. Her words suggest that she departed her
home world with others, though she cannot recall the
names of her erstwhile companions. All efforts to
explore those memories have met with a rejection
response.
SR4
Subject's memories have not returned, and our
conversations remain less than lucid. What fragments
can be gleaned evoke a bygone world, like one out of
fairy tales. As improbable as it seems, the question
may not be where she has come from, but when. If she
truly has crossed through time, the prospect of probing
her heart is all the more compelling.
SR11:
I have seen it through; the Keyblade War unfolded
exactly as written on the Lost Page. Now, the
Keyblade the Master entrusted to me must be
bequeathed to another. Five Union leaders have been
chose from the surviving Dandelions. I will pass the
Keyblade to one of them, and then contine watching
the future unfold.
Yet it seems that someone has pulled the old
switcheroo. One of the Five is an impostor, someone
the Master did not choose. They represent a virus in
the program he so carefully wrote.
The virus has begun a strange undertaking: a reckless
plot to allow the Five to escape into another worldline.
Surely such a thing can't be possible? We're talking
about the same trick that allowed the Dandelions to
transfer to other worldlines after the Keyblade War.
But these children are no Masters. They haven't the
means...unless, of course, a certain lady of magic
summoned here from the future knows more than I do.
The whole Union leader thing was supposed to be by
the books. Are these new events just another phase in the Master's grand plan?
SR12:
Even on a worldline with no Keyblade War, a peace is but
a dream. In the absence of us and our Master, a
"darkness" arrived -- one that shall surely lead the World
to yet another demise.
Amid the chaos, I bequeathed my Keyblade to one of
the Union leaders, just as the Master instructed. I
watched as the Five were sent to another worldline -- at
no small cost -- ensuring the line of Keyblade wielders
will live on.