So, regarding the Askr Trio

My exact thought when looking at Book 3.

Maybe they could get Masked Marth-like variants from the future. (Spoiler alert, Masked Marth is in fact Lucina.)

Book IV could be a fight against a god or goddess of time, or the world serpent dragon, or Ragnarok, or who knows.

And the fans could call them the MAskr trio.

(This is the inevitable progression for games like this or Pokemon where there are Shinto-like boss creatures that represent things like fire, ice, the sun, rain, the sky, etc.: inevitably you get pokemon or heroes that represent time, space, creation, death, meta-stuff like that.)

I'd actually like them going this route because it wouldn't indicate how the story goes one way or another for those just coming into the game.

Anna will never get an alt. IS seem to dislike her by giving her an appalling refine and, despite her being the series mascot, ignored for an alt when the two original, flat characterised siblings get one.

I think Sharena is dead not possessed. There are white roses around her picture which is the flower of death.

maybe at the end of this book we will get some alts for them
atleast i hope. maybe dark sharena and light alfonse, like opposite to eachother