The woman at the end is
Spoiler!
Adele. She's the younger sister(I assume she is younger) of the foolish prince. Later, Adele will start an uprising, when the king and foolish prince started a war with the Yutia empire. When the war was unsuccessful, due to Ellie(Elisabeth), the king got beaten by Adele. But to be fair, the king got his a$$ beat by Ellie, so Adele was only beating an already beaten old man. As for king Bratt and prince Fried, they were sentence to execution. As for Sylvie, she was sentence to be a criminal slave and to work on a mine, since she couldn't pay her family debt. So the miners are going to use her like a rag(if you know what I mean😏)