Motoko Kusanagi
A second character is also introduced in "Ghost in the Shell 2: Man/Machine Interface" named Millennium, who controls a group named "Stabat Mater" that is researching a process known as "Brain Expansion". This research is apparently called off after Millennium is taken over by Motoko Aramaki. At this time Millennium is revealed to be "'No. 20' (Millennium)," indicating that Millennium is another of the Motoko Kusanagi/Project 2501 hybrid entities.