Update: if finished her design and she loved it, Made the design vertical to cover the bad spot and the on the other leg I placed it horizontal , then put a very small one on the front yoke of the jacket.
Ask her what she collects ??Angel,plants ,cars lol whatever she love then sew that there only** and if she likes it add more but let her decide. Hugs Carolyn
Try a cute little fleur de leigh in the same color. Can add the fleur de leigh on the jacket as well like you said.
I think I would use goggle to find embroidered textiles. Maybe you get some ideas. What did she have in mind? I would probably embroider the same design on the jacket as well to make it look intentionally.