This paper model is a yellow Tachikoma, a fictional artificial intelligence, walker / roller in the Ghost in the Shell universe, the papercraft created by Palmer, and shared by Mypapercraft. There is another similar Ghost in the Shell walker paper model on this site: Ghost in the Shell – Fuchikoma Free Paper Craft .
Tachikoma are as large as an average sedan, are painted blue and have four "eyes" fitted on the surface of their bodies. Three are on the "head" and one is beneath the abdomen. Each eye has three pinholes, loosely resembling a bowling ball. These eyes sometimes become expressive in the typical anime style.
Tachikoma are controlled by individual AIs, are capable of speech and generally exhibit a childish, curious, joyful and active personality, although they are consummate professionals in the field. They normally operate as independent units and receive orders from human agents, but they can also be directly piloted from a cockpit in their abdomen. Its design is implicitly based on that of the jumping spider in terms of bio-mechanical modelling, and system technical design was based on the Fuchikoma.
Tachikoma have four legs and two arms. They can move by walking, or they can drive at high speed by using the wheeled footpads on each of their four legs. Each wheel appears to be angled and omnidirectional, allowing the Tachikomas to move in any direction with their drive system, which can control all degrees of freedom in its task space. Other abilities of the Tachikoma include jumping great distances, sticking to vertical or inverted surfaces, engaging a thermoptic camouflage mechanism, and grappling/rappelling using their adhesive string launchers. Tachikoma maintain control of their legs while using wheels to drive down a road, and shift their weight around turns. They can also roll briefly on to two legs while driving to avoid an obstacle or pass through a narrow space. To make balance easier, they can move their heavy abdomens with a Ball joint.
Standard Tachikoma equipment includes a 7.62x51mm light machine gun mounted in the right arm, a secondary weapon hardpoint in the "snout", a universal cybernetic connector on an extensible, prehensile cable in the left arm, liquid wires that can be used for grappling, rappelling or for restraining purposes and a built-in thermoptic camouflage system.
Though they possess individual artificial intelligence, every night they are synchronized, so they start the next day with identical consciousnesses that are each the sum of their total collective experience and development. This leads to identity confusion, since each Tachikoma has the same memories. Though the Tachikoma have identical memories, their personalities and opinions are distinct. It is explained in the last episode of the first season that it is their curiosity that lets them be different from each other.
These individual personalities are distinct among Tachikoma. One considers itself Batou's personal Tachikoma, which has a personality of a hyperactive child. It is special, given that Batou pampers it with natural oil and refuses to operate any other while on assignments. The second Tachikoma is more logical, acting as the straight man to the first. The third Tachikoma appears somewhat slower than the others, and at times has difficulty keeping up with the other Tachikomas when discussing such in-depth topics as what it means to be "alive". There is also a fourth Tachikoma with a distinctive personality, who is a bookworm and an intellectual. Its body was taken apart during the experimentation incident, but its AI has presumably been saved for further analysis. During finale of the first S.A.C season, while all but three of the Tachikomas are either locked away in a lab or dismantled for study, three surviving Tachikoma units abandon their civilian posts to assist the Major and Batou.
Dr. Asuda is the government researcher who single-handedly developed the neurochip used in the Tachikoma's A.I. and is considered by the Tachikomas to be their father. In the episode "Afternoon of the Machines - PAT," Asuda tries unsuccessfully to defect from Japan because as a state-funded scientist, he is not allowed to hold patents on his inventions. Desiring to leave a record of his achievement, the good doctor inserted a trace of himself in Tachikoma's memory during their reconstruction post-season 1. To prevent another collapse in the A.I. structural integrity, it is decided that he'd delete this last bit of sentimentality.
You can download this paper craft model here: Ghost in the Shell - Yellow Tachikoma Free Paper Model Download