The Mimic - (Chapter 2) Monster 1

 About 

Known to be "Rokurokubi" this monster has a very long neck, with a Mask/Face just like the one that the (Chapter 1) Monster 1 has, but with white eyes. You can only find her at the start of the Chapter 2, at the "Imperial Palace".

You can find her Mask/Face in the "Cave" at the end of the Chapter 3.

 Media