"Major" Motoko Kusanagi is an agent of Security Police Section 9. All background info about Kusanagi is unknown, but assuming from her nick-name, she may have been in military service before. She is an expert on unlawful activity, secret intelligence, and demolitions. The "Major" was scouted from the special maneuver team of the Ministry of Home Affairs. She commands Bateau and Togusa, which makes for the number two person in Section 9. Kusanagi had her body changed to that of a cybernetic one; Motoko's body is almost completely a robot and only a part of her brain is from her original body. She has an early 20's cyborg body, but actual age is estimated at being in her late 30's. Her sub-brain can access any kind of computer network on the Earth. The appearance of the Puppet Master has caused her to suspect the existence of her very soul or "ghost".
