@ned
First Picture :
The black leather jacket & boots are from Kasumi Costume 27 (the one with Floral dress)
The black skirt is similar to Kokoro Costume 7 (the symbol is different on belt)
The underwears are from costume 8 or
Ninja Gaiden 3 Razor's Edge "Infiltrator"
Second Picture :
The purple hoodie underneath is like the Tina yellow one from costume 2
The skirt is similar to Hitomi blue police officer costume 33 but in black
Boots are same as the first picture with a very small difference shinning effect removed
I have been able to find the original works, here the deviant art links
First one have been made by Dizzy-XD
http://dizzy-xd.deviantart.com/art/Ayane-Render-38-466183754
Second Picture Overall Mesh Design : Bstylez
http://bstylez.deviantart.com/art/DOA5LR-Ayane-Casual-Battle-NEW-571368789