I know some people ship Nina and the Duke kid, but I don't like spoilt brats like that so I can't ship it. Nina is too good for him. He dare walk into a woman's room where men are strictly prohibited? He even admitted that he knew men were forbidden and said: "so what? I am a duke, I can do whatever I want". That is what I call disrespect. Don't be fooled, Nina. Just cause he's a kid makes no different. He's gonna grow up to be a sexist anyway. Don't be fooled!
Oh, I also can't see Nina and the highness cause the age difference is too much.