Originally Posted by
Iscah
There's no "proper time" besides a point in the Ascians' plan where they needed someone to play a part. They do not have control over the flow of time and they cannot see the future. They are working on their plan here and now, which is getting the First set for rejoining and then keeping it there until they can set off an equal calamity in the Source. The time difference doesn't matter. They are working on it "now".
Sure, he probably kept her in stasis until the point where they needed a pawn to manipulate, but that's not some cosmic "proper time", just the point where she got used.
This seems to be exactly the case - she was placed in the First a hundred years ago and hasn't aged since, although the reason is unclear and it may not be anything to do with the time flow.
In any case it's not something Elidibus would necessarily plan for. Does he care what happens after as long as she fulfils her purpose? Is she a conveniently long-lived pawn that they would keep manipulating to serve their purpose of keeping a careful balance of near-flooding Light?
In any case, Elidibus seems to have neglected her entirely in the hundred years since. The plan she was part of has been abandoned, and she has been left to fend for herself. Just a tool that has been tossed aside.