I kind of agree with you about the Leone family, but I am wondering what twist Clint put in his will after we seen the letter and Journal he left to Kylie. I think either the will or us, will try to guide the family back to their roots as protectors. As far as the 2 princesses we still need, right now I can only think of 3 choices that has been mentioned that could possibly work. The Goblin King's family member as you think, Sofia the celestial (though you might be right about them not counting her, but I see her being another LI either way), and only other royal family that is not human that is mentioned is Kathy's siblings (our cat beastskin slave) her father is/was king and her brother is taking over if I remember correctly. I honestly don't remember any other royal families mentioned in the story so far, or have met.