If there's dragons and a medieval world added then sounds like a great expansion pack idea, if no world and no dragons, still a great idea but more fitting a game pack.
But still, awesome idea! Could have balls as a party theme, and jester as a career along with royal knight as career.
Cross play ability with Horse Ranch and Cottage Living (knights riding horses, commoners having mini sheep and other farm animals plus crops) Royal vampires, spellcasters etc.
And as you mentioned, fairies, like a fairy Godmother that grants wishes to whomever they are in charge of.