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Ancilla were the Forerunner version of human AI. As exemplified by the Monitors, the Forerunners have developed a civilization with an extremely advanced knowledge of artificial intelligence technologies. Forerunner Ancilla have managed to achieve full sentience and are highly intelligent. The Forerunner Bornstellar-Makes-Eternal-Lasting had an Ancilla in his Forerunner armor as do all Forerunners with armor.
Known Forerunner Ancilla
- 000 Tragic Solitude - Monitor of Installation 00.
- 049 Abject Testament - Monitor of Installation 03.
- 343 Guilty Spark - Monitor of Installation 04.
- 2401 Penitent Tangent - Monitor of Installation 05.
- 031 Exuberant Witness - Monitor of the Genesis Facility.
- 032 Mendicant Bias - Wartime Ancilla, overseer of Defense Plan against the Flood, defected from the Forerunners after corruption by the Gravemind.
- Offensive Bias - Wartime Ancilla, replacement to and destroyer of Mendicant Bias.
- Unnamed Forerunner A.I. - Ancilla on Shield 0459.
- Cold Storage Monitor - Ancilla overseer of a flood research facility on Installation 05.
- AdjutantReflex - "Ancilla" that acted for Bungie on their forums during the Iris ARG.
- 686 Ebullient Prism - Monitor of Line Installation 1-4.
- The Knowing - An Ancilla residing in a Forerunner complex on Ariel.
- Intrepid Eye - An Ancilla residing on a Jat-Krula installation on Gao.