Add one impossible ribbon trail without changing my portrait

Use my permitted portrait [SOURCE PHOTO] as the fixed base. Preserve every person, face, hairline, expression, hand, garment and camera crop. Weave a single [RIBBON MATERIAL] ribbon through unoccupied space, starting at [START POINT] and ending at [END POINT], without crossing eyes or mouth. Before sharing, mask any private text or identifying background details rather than preserving them for realism. Give the ribbon consistent width, tension, occlusion and a plausible shadow on nearby surfaces. Deliver one composite and a list of touched regions. Reject loops that pass through bodies, extra fingers or any altered identity. Mask and restore source pixels wherever exact facial preservation is required.