It's not impossible... It's just a styling nightmare that involves foamcore and lots of styling products. And possibly stubbing. And sewing that damned hair wrap on. *Trails off into angry mutterings because her hair wrap always slides off after long periods of time*
Other than that... Original FFVII Yuffie Kisaragi is a GO! Kind of. Oh well, the Materia is what matters, and I have a whole bunch of bright red/orange ones that I'm in the process of naming. But yes. I need to Bondo the metal garter of doom, do the leatherworking for that, find a shirt and shorts, make the headband, find fishnets, do all the armor work for the gloves, make the gloves, find the fishnets for that...
All I really have done are the individual pieces of the giant arm sock of doom. Good news is that I no longer hurt myself with my giant shuriken while doing her little in-battle magic casting jig.
Anybody wants Summon Materia, I'll consider giving them to people at the con. Once upon a time they were decorative resin grapes the perfect size for Materia. Then I got my hands on them.