Proto

Proto is Section 9s only prototype bioroid member and was also the Tachikomas maintenance technician before becoming one of the new recruits. During the Dejima crisis Proto played a key role in helping Aramaki rescue the Prime Minister Yoko Kayabuki who had been relieved of her duty and arrested under charges of treason. Proto managed to gain access to the net where he communicated with Section 9s Tachikoma units. Through them Proto was able to gain building blueprints and uptodate information on Section 9s Dejima operation as well as the location of the Prime Minister before an attack barrier disabled him. Proto appears again in the Ghost in the Shell: S.A.C. Solid State Society movie wearing the black uniform of Section 9 along with a sidearm which suggests that he is now a field officer. wikipedia