User blog comment:Galileo007/I'm back./@comment-2037710-20150714060138

It's actually not Doppelganger, that's Goddess Ilias (2). You have to kill Alice during the story ending of Chapter 2. It's unfortunate but that's how it's done.

With Chapter 2 integrated into 3, Doppelganger is actually a white dot in the extra menu on the bottom of the screen, for whatever strange reason.