After Madeline and Badeline decide to work together in Chapter 6, there's a few screens in Chapter 7 before they do a combo move that shoots them far higher up the mountain. By combining their powers they're literally soaring through the sky, reaching heights that neither could alone. There's some dialogue where Madeline has become the strong one and Badeline the fragile and reluctant one... how far you've come, wonderful red-haired lady.
I've cried again, just writing this out.