of The City and are made out of an unknown, nearly-indestructible material. They are part of some kind of major isolation system between the gargantuan floors of The City. Attempts to approach the megastructure result in a massive safeguard response so as to prevent trespassing. Only a direct Gravitational Beam Emitter blast is known to have been capable of tearing a hole into a megastructure. The Netsphere - A possible future incarnation of the internet available only to those with the Net Terminal Gene and guarded by the Safeguard. According to the opening of the Net Sphere Engineer, it was meant as a new world order, and could fulfill the desires of the people. It is posited in NOiSE that it was in fact a New Social Order designed to exclude the infected. It can only be accessed by those possessing Net Terminal Genes. Toha Heavy Industries (originally ) - A massive edifice or possibly vehicle separate from the megastructure. Toha Heavy Industries was mentioned as the benevolent organization in Biomega as well as a mecha manufacturer in Knights of Sidonia. It is inhabited by humans known only as the 'planters', and is the origin of the splinter group, the 'fishers'. It is controlled by a central AI, and has a collective of thirteen other AIs; one controlling each cave. The Collective AI was created in an effort to prevent insanity, however, in the end it did not work out. The central AI shows increasingly irrational behavior with its use of teleportation technology, and its gravity furnace. The AI isolated itself from the outside using a treaty from the Governing Agency because of the seriousness of the Silicon Creature's disease, and excommunicated those who did. Toha Heavy Industries is crucial because the planters may be net gene carriers. Structure conversion towers - These buildings appear to be autonomous energy reserves and/or producers which are independent of the Megastructure. They are apparently capable of synthesising any form of matter, mainly Safeguard units. Davine Lu Linvega hijacks one and uses it to download various types of constructs, including special Exterminators which bear her face. Plot devices Net Terminal Genes (originally ) - These are the special genes which allow those possessing them full access to the Netsphere. However, the Net Terminal Genes are incredibly rare by the time period where BLAME! begins. The Net Sphere protection agency, also called the Safeguard, is