Ghost in the Shell is the original manga created by Masamune Shirow.
The overarching story of the manga is of Major Motoko Kusanagi's hunt for a cyber-criminal, The Puppeteer, whose real identity is unknown. The Puppeteer commits a large number of crimes through a single modus operandi: "ghost hacking", that is, breaking into and taking control of human minds. As the agents of Public Security Section 9 start to unravel the mystery of the Puppeteer, it becomes clear that it is no ordinary criminal, but a unique autonomous artificial intelligence project created by another government agency, the Treaty Bureau of the Ministry of Foreign Affairs (MFA), also known as Section 6. The Puppeteer escapes Section 6's control in pursuit of his evolution through merging with Kusanagi. Kusanagi, although initially skeptical, finally agrees to allow the Puppeteer to merge with her own consciousness, sharing her body, in what is no doubt intended to raise even more questions about the nature of human identity in a world where human consciousness is no longer unique.
Below are the characters found available on the site that cosplayers have depicted.