@BCS its probably setting up for the inevitable reveal that 1) she's the child of the demon mentioned previously and 2) She grew up with a bunch of convicted criminal masterminds and as such is probably stacked with abilities and skills from them and
So the premise of the story is that the Hero's party was betrayed by their country after defeating evil huh.
Talk about the real evil revealing themselves.
The lowly criminal would be the one that commited illegal acts.
So without knowing the legislation of the country they are in we can't really say who is the "lowly criminal".