The AIDA are "natural" AIs, formed from the errors in the Internet caused by the disappearance of Aura. Unlike Aura, who was created by a system, the AIDA evolved much like normal life. The AIDA were originally harmless, but after several thousand of them were produced, a mutant appeared. This AIDA, Tri-Edge, had aggressive tendencies, and attacked a player. Since the AIDA are all connected, this aggression soon spread to the rest of them.
As the AIDA learned more about the outside world, through online news and the memories of their victims, they attempted to recreate parts of it within R:2. The first such artifacts were coinlockers, modeled from the news article "Coinlocker Baby" that first made AIDA aware of humans.