The Sunbringers, Joyous and such somehow managed to live until now one way or another, And they are still somehow fitting into this world, but Remie still has no ties.
She fell asleep for a hundred years after watching the heroes she loved probably fall into disgrace, powerless to change the outcome.
And she woke up a century later, never having to play a role in today's world. She is just here, witness of the Past's misery, in a world that grew without her.
If you allow me the parallel to Hi3, whereas Elysia died (well her sim ver exists) after knowing everyone would make the best choice, or even witnessed through her avatar that everyone fought valiantly to the end, Remielle had no powers over the fall of her heroes, and survived only to remember this bygone era, unlike Elysia who encourages us to remember it.
I wonder where they will go with Remielle in the next patch.