Cute! If you get it cast in clear resin, what will you do with it? Use it in a game or in a diorama, put it on display by itself, ...?
I do see the ghost (head, 2 arms, flowing sheet-robe), but I have a suggestion before you cast it:
People might recognize it as a ghost/humanoid more easily if they saw eyes or eye-holes. You could use a knife to cut away the face and then resculpt a face that includes eyes/eye-holes.
If you're willing to go as far as sculpting a version-2, I would suggest paying more attention to the drapery. A sheet draped over a person would have logical folds and billows, which your sculpture doesn't quite achieve. You can get away with a lot by saying that it's "ethereal cloth" or ectoplasm, but you might still find it useful to start with a reference and then deviate from it. You could ask your wife to model (wear a sheet and strike a pose) while you take photos as reference on the folds and drapery. Don't forget to assure her that she's much lovelier without the sheet.
Derek