Ghost in the Shell

Everything About Fiction You Never Wanted to Know.

Ghost in the Shell is a cyberpunk and/or Post Cyber Punk franchise created by Masamune Shirow, centered around a cyborg woman in an elite Japanese police force. While each part shares the same characters, settings, and themes, the plot and continuity varies between the different adaptations, each of which are listed below.

If you are looking for a trope about people living inside your head, it's here.