I vote for Dorothea to win.
Dorothea is someone who always had found themselves a with the odds against her, but manage to always thrive in the given circumstance. Didn't have to rely on advantages or items to survive. Displayed what it takes to the winner. Edelgard is a very close second for me. Had I gotten the chance to connect with them more, I could have seen myself leaning that way. Dorothea is very worthy of this, and I am proud to call them a friend.