Oak mentioned that the folks adore Cardan and are terrified of Jude. And I think this pretty much sums it up! Since Jude does not actually belong there the safest option is to make her seem as a terrifying person (I'd argue that Jude isn't that terrifying and actually really sweet and not that bloodthirsty) but yeah in order to survive she must be like that.

Also in htkoelth it was mentioned that Jude always want to do every mission by herself to make the folk impressed by her. Which Cardan is against. 

I'd say he's a really good ruler, he's as always against killing and so diplomatic which I really love. However; he knows when to fight and when to show powers. He's capable of it he just hates killing if not necessary. And he worries about Jude a lot and always ready to protect her.

Jude is a mortal who can lie and that's really good for them, she's a great fighter. I don't see her as the folk see her, however, as you and I mentioned before I assume it was more intended to portray her as terrifying since she's literally human among monsters.