Artemis

Artemis is the overarching antagonist in Black★★Rock Shooter DAWN FALL. Once the artificial intelligence at the core of Project Elysion, it chose to fight against humanity instead and is responsible for the Earth's devastation over the course of twenty years.

History
Artemis was originally created by a genius scientist named Luna Griffith as part of Project Elysion. One of its purpose was to lead the terraforming on Moon and Mars, allowing the United Nations to gain access to their resources to strengthen themselves as a peacekeeping organization and to eliminate worldwide poverty, thereby preventing the rise of another worldwide terrorist organization like the CTG. By design, this artificial intelligence would be able to process through hundreds of yottabytes of data in an instant. In order for Artemis to terraform on extraterrestrial bodies, it would require aspects of human thinking that are linked to consciousness, so Luna gave it a body to decide and act on instincts.

Etymology
Artemis, written in Ancient Greek as Ἄρτεμις (Ártemis), is the goddess who represents the hunt, the wilderness, wild animals, and the moon in Greek mythology.

Trivia

 * Artemis is similar to Innocent Cloud, the main antagonist of Black★Rock Shooter FRAGMENT, due to both being A.I. entities. Unlike Artemis however, it is possible that Innocent Cloud was created by accident, as it wasn't originally intended to be part of the network that it takes over.