Loving number 2, classic vibes.

No Capes!

To be honest I like her regular outfit just fine. Give her a boob window or something just to make her more “super”

Number three, with the domino mask and a sash in place of the belt/cape.
Question is, Nylons or Fishnets.

Maybe No.1 with mask but with more spy catsuit theme.

Number2 please.

Capes are for "Flying Bricks" (or anyone with plot armor to equal one, looking at you 'Batsy'!)

Besides, Anne there's a compromise: Don streetwear, and project the sexy super-suit look above it when not invisible. Best of both worlds!

No Capes!

Mask and the Psylock unitard, please. Spy is too precious to lose to a cape related fatality. Have we learned nothing from the Incredibles?

True that, drawing a naked body is so much easier than adding clothes on top of it. I never considered that might be the reason super heroes were drawn that way, seeing how increadibly talented super hero artists usually are, but you may be right.

If you are using invisibility just go naked! It is not like they can see anything…