Lighting as a model? Sure, that could work. Maybe her strawberry blonde hair makes her a unique candidate.
A recent Louis Vuitton campaign ad actually uses the Final Fantasy character as a model for the French fashion company's latest campaign (as cited by DualShockers ).
Nicolas Ghesquiere shared a "Series 4" promotional video featuring Lightning (see it through the link above); and as Ghesquiere stated:
"Reality and fantasy become one. Lightning a genuine heroine in the new @louisvuitton series 4 ad campaign."
Square Enix's Visual Works CG division produced the video under the direction of long-time franchise boss Tetsuya Nomura. And these outfits were actually shown off earlier this year at the Louis Vuitton Women's Spring-Summer Fashion Show. If you're interested, check it out right here: