How would you describe aunt betsey

The unusual sister of David's late father. Miss Betsey, or Miss Trotwood, disapproved of the marriage between David's parents because of their significant age difference. She herself had a disastrous marriage with a man younger than she was, and after their mutual separation, she moved to a small house near the sea with one servant and lived a secluded life. She storms out of David's house when he is born, upset that he is not a girl.