A Tachikoma (Japanese: ????) is a fictional artificial intelligence, walker/roller in the Ghost in the Shell universe; appearing in the manga, created by Masamune Shirow, and the Stand Alone Complex sub-universe. Nine of them are assigned to Section 9's use originally. They are spider-like, multi-legged combat vehicles, equipped with artificial intelligence. The spider design appears in other places in Shirow's work, like the Appleseed manga. Shirow is noted to keep numerous spiders as pets.
Production I.G was unable to use the Fuchikoma design in the 2002 Stand Alone Complex anime television series due to copyright conflicts. However, Masamune Shirow was able to design a legally safe equivalent to the spider-tanks for the new show, which he named the "Tachikoma". There are distinct differences in the design, most significantly in the eye-equivalents and the vertically oriented abdomen. Still, the tanks are easily recognizable as descendants of the original Fuchikoma. Their AI personalities and roles in the new series are indistinguishable from their predecessors in the manga.
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Design
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 7.62×51mm light machine gun mounted in the right arm, a secondary weapon hardpoint in the "snout" (a 50 mm grenade launcher, capable of launching both explosive and gas grenades which can be replaced by a six-barrelled 12.7×99mm Gatling gun), 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.
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Description
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.
Appearances
Stand Alone Complex
In episode 12 of the Ghost in the Shell: Stand Alone Complex, one slightly malfunctioning Tachikoma goes on a joy-ride through the city, where it meets a young girl named Miki who is looking for a lost dog. The episode is mostly comedy but turns serious, with the Tachikoma attempting to understand sadness and death. In a later episode, the Tachikomas argue among themselves over which met Miki, since they all have the same memory. Yet when Batou calls for his Tachikoma only his actual Tachikoma raised its hand. As it leaves with Batou, it suddenly remarks with quiet surprise that it indeed must have been the one that met Miki.
Batou has the most affection for the tanks, picking out one tank as his "personal unit" and spoiling it with natural oil instead of synthetic. This is what causes his to go haywire later, when the natural oil dissolves some of the proteins in the Tachikoma's AI neurochip. On the other hand, Togusa, the least cyberized of the Section 9 staff, holds a less idealist view: "they're just machines." Aside from leading to an indignant outburst from the Tachikomas (who accuse Togusa of bigotry), it sets up something of an antagonistic relationship between Togusa and the tanks, which is revisited in an episode in season two. Major Motoko Kusanagi holds the most pragmatic view of all. Her only regret following the Tachikomas' suicide attack is that she didn't get a chance to dive their AI, and discover whether or not what they had acquired was really a "ghost". In the manga, she expresses concern over the evolution of the Tachikomas' AI and orders it monitored to catch any undesired emotional developments or an unwanted "rise of the robots."
By the end of the series, the Tachikoma fleet start approaching sapience; all are sent back to the lab for dissection, amidst fears that they are no longer fit for combat duty. It is the use of natural oil in Batou's personal Tachikoma (all other units used synthetic lubricant) that acted as a catalyst for the behavioral anomalies that began to manifest as sapience. Major Kusanagi subsequently bans the use of natural oil prior to the later decision to halt deployment of Tachikomas in field ops.
Three Tachikoma survive the mandatory decommissioning, (one blue, calling itself "Batou's Personal Tachikoma", and two others, repainted yellow and silver) and prove their worth when they abandon their new civilian jobs to save their imperiled comrades, without explicit orders to do so. The silver Tachikoma is destroyed on sight after it rescues Batou from attack by an Armed Suit, a bipedal power-actuated armored exoskeleton. The blue and yellow Tachikoma combine their efforts to save him, and conduct a desperate and ultimately suicidal attack against the Umibozu, while Batou watches from a nearby terrace with a stricken look on his face. This selfless act is the last thing they ever do. Those sent to the lab for structural analysis were restored from backups, their A.I. given a slew of upgrades and loaded into a new fleet, which appears in the second season.
S.A.C. 2nd GIG
In the second season, S.A.C. 2nd GIG, the enforced synchronizations among Tachikomas are limited to essential data only. Motoko Kusanagi allows them to maintain their own personality after the events in the first season. They can still share information and sensation via synchronization should they choose to. The Tachikomas are also outfitted to perform complex networking tasks including net-diving to aid Section 9. Several episodes featured the Tachikomas operating in the net using a representational avatar, instead of their map symbol of a triangle in a circle. It is indicated that while operating within the net, they could not inhabit their physical units.
It is hinted that Tachikoma units developed ghosts. During the finale of 2nd GIG, while ordered to create a repository in cyberspace for the memories (and hopefully, ghosts) of all refugees of Dejima, they secured instead their own memories within the netspace and sacrificed their AI satellite to prevent a nuclear explosion. A fellow AI, the bioroid Proto, saw this and announced to the viewers that Tachikomas do indeed have ghosts.
Solid State Society
During the early portion of the film Solid State Society, the Uchikomas are seen being used by Section 9 in a way similar to the way the un-learned Tachikomas had been used. It was revealed that the engineers at Section 9 failed to reproduce the phenomenon whereby the A.I. develops an advanced state of self-awareness. However, the reappearance of the Major also brings the return of the Tachikomas. Initially they are seen in their cyberspace avatar forms, sporting different decals and individual names such as Max, Musashi, Loki, and Conan (names directly lifted from the Major's AI partners in the Man-Machine Interface manga). Eventually they are reintroduced to physical bodies, and rejoin Section 9 as full members.
Tachikomatic Days
Tachikomatic Days (???????, Tachikoma na Hibi), also known as Tachikoma Specials or Tachikoma Days, are a series of shorts attached to the end of every episode of Ghost in the Shell: Stand Alone Complex. Each short takes features the antics of the Tachikoma think tanks of Section 9 and involves plot points from the episodes. Ghost in the Shell: S.A.C. 2nd GIG also has Tachikomatic Days at the end of each episode and most of the DVD and iTunes releases of both series.
Tachikomatic Days did not air on Cartoon Network's Adult Swim broadcast of Stand Alone Complex and 2nd GIG. However, they are shown on Adult Swim's free webcast programming service Adult Swim Video. On Australia's Cartoon Network's Adult Swim, the Tachikomatic Days shorts are broadcast with each episode. The UK's AnimeCentral broadcasts Tachikoma Days with each episode.
Merchandise
Numerous Tachikoma merchandise items were released by various companies, including a 1/24th scale plastic model kit produced by Wave in December 2005.
Source of the article : Wikipedia
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