No,Itīs not the king of Nabradia nor anyone from there.
The Stillshrine of miriam is the Necrohol of Nabudis on the future.
The souls of Nabudis decided to get revenge and made a weapon to destroy the sun cryst.
Thus,Rasler and three of his most loyal knights sweared to use it for good.And statues of them were made.
In another timeline,Princess Ashe was in fact dead.But she reincarnated on Penello.