049 Abject Testament

049 Abject Testament

049 Abject Testament is a Forerunner monitor created to maintain Halo Installation 03 (Gamma Halo).

Didact

Didact

The Didact was a once revered ancient Forerunner commander who battled the Flood during their civilization’s fatal war with the parasite.

343 Guilty Spark

343 Guilty Spark

343 Guilty Spark is a Forerunner monitor created during the final days of the Flood War in order to maintain Halo Installation 04 (Alpha Halo).

Librarian

Librarian

The Librarian was responsible for the Conservation Measure, an effort to ensure the survival of sentient species from the destruction effects of Halo.

Mendicant Bias

Mendicant Bias

One of the most powerful Forerunner AI ever made, Mendicant Bias was turned against his creators by Gravemind.

Master Builder

Master Builder

The Master Builder was one of the most powerful Forerunners to have ever lived, and was responsible for designing and commissioning the Halo Array.

2401 Penitent Tangent

2401 Penitent Tangent

2401 Penitent Tangent is a Forerunner monitor created during the final days of the Flood War in order to maintain Halo Installation 05 (Delta Halo).

Warden Eternal

Warden Eternal

The Warden Eternal is an ancient Forerunner ancilla who now serves as the majordomo of Cortana’s forces.