Crash X
[14] Master
I wouldn't deny that her 1P outfit in 4 was iconic, but I'd be lying if I said it didn't take fanservice for the character a bit too far, which is pretty much one of the reasons why so many dislike it (me included).I don't think Ivy's SC4 P1 was iconic. The thread covering her nipples was but I don't remember what the outfit as a whole looked like off the top of my head. She has other, far better outfits that should be CAS pieces.
Oh and if you want to remember what her outfit in 4 looked like, this was it: