When you are heading for the boss with EVA, first shoot the two kerotans(1 below log to the bottom right side of screen you have to look using first person view from the starting point of the cliff on your bottom left side 2 behind Golova tree in middle of intersection in Area2) After shooting the two kerotans, go to heal and choose EVA, she should be wearing nothing but her bikini(if you zoom in you can see the outlines of her womanly "parts" and u can see her nips if u use x-ray view)