Ascendant Justice's AI

There was an unnammed Covenant AI Artificial Intelligence construct used by the Covenant. The Covenant AI was stationed on the Covenant flagship Ascendant Justice. It never identified itself with a name. When Cortana infiltrated the Ascendant Justice, the Covenant AI tried to stop her, but it was mostly unsucessful, as she eventually caught it and decompiled it. The Covenant AI managed to send a message over the Battlenet before it was caught, warning of the capture of the ship and sending the calculations for a sub-atmospheric Slipspace jump.

The AI appeared to demonstrate "fractured" thinking, as though it were suffering from the errors of being copied extensively. Cortana also stated that its algorithms looked very familiar. She guessed that a UNSC AI had been captured and copied. Later, there were several security AI's aboard the Unyielding Hierophant.