Is that the front of the dress in the center ... I think I see a neckline and buttons??? Very nice!
I would SITD around the horizontal stripes in the border to make them stand out. SITD around the narrow black borders in the quilt. The wide black and white borders would look great in pink feathers. Put straight horizontal lines on the inside pieced borders (around the "dress") as if the black striped borders were coming through - then stiple around them. The large floral print I would stitch around the larger flowers both on the border and in the 'dress' - on the dress I would also stitch around the neckline and the buttons.