Thor

Overview
(A.K.A "The original AI") Thor (based on the norse mythological god. See Thor) is an AI who appears early in the Resolve Era. He gives his assistance to Dissonance in both reaching Utgard and deleting The Third Party. He is considered the most powerful of the 4 AI's. He is also considered the most "neutral" of the AI's, having no bias to a single cause.

Plot significance
Thor forms a deal with Luna to create an AI-controlled government early in the Resolve Era if Luna would be his human representative. They attempt to do so by taking control of the WWW using the Utgard Sanctuary, a collection of nodes that have administration privelages to Project MAC.

In episode 9, Thor faces Revenant and is eventually defeated by Freya when she sacrifices herself to save Raziel.