What's her best pitch?
Drop ball......
Turnover? I have only seen highlight clips of her pitching and thought it was a drop ball. I saw somewhere that when she was young she threw a knuckle ball.
Her change up may be a knuckleball, but her "bread and butter" pitch is a turnover drop. She does a very good job of getting her weight out over her plant leg and she has a lot of late break on the ball.