Edelgard is my favorite lord in 3H. That being said, I personally disagree with Her Majesty in not pursuing TWSITD openly and publicly.
I wish she had been strong(er) or, in a stronger position as to declare her enemy in the open. I think playing shadow games with TWSITD really did not pay off.
That completely aside, I feel she has a great personality. Were this Garreg Mach, I'd be her groupie - free. I adore her. Haha. 😄