How about this: An inner hood lining that's only slightly bigger than your head, and an outer hood that has the size and structure you want from the character reference. The small inner lining will keep the hood from flopping forward because your head is in the way.
Put some heavy-duty interfacing on the inside of the outer hood, and when you attach the lining to the outer hood at the outer edge (where you see the large stitches in the reference material), stitch some hat wire into that seam. Then do the decorative whip stitch with yarn or whatever. Use the hat wire to shape the front edge of the hood.
The references don't have a top seam along the hood, but you may need to add one, and put a second piece of hat wire in there so you can make the long crooked pointy shape. Or, you might be able to accomplish this with the right pattern, some heavy-duty interfacing, and maybe a little internal batting with hat wire or chicken wire to give it that shape.
If this explanation doesn't make sense I'll see if I can draw a sketch.