Elegant, sly female main lead

Hmm, I can only think of Empress Ki, but she doesn't become elegant until halfway thru, when she enters the royal court. Before that, she's pretending to be a guy, so can't really be super elegant lol. 

I hope others can think of some more, because I absolutely love these types of females, but can never find any.  

I don't know if you're going to like Cheese in The Trap, but there's a supporting lead in it called Baek In Ha and she's pretty sly, not that elegant tho.