Monitor
From Halopedia, the Halo wiki
Summary
The Monitors are AI constructs created by the Forerunners to service and maintain the Halo installations, and to make sure that The Flood stayed imprisoned. They are a rounded box shape with one glowing eye on a side. They have the ability to teleport themselves and others around the Halo. In case of a catastrophic outbreak, the Monitor would seek out a "Reclaimer" to activate the installations and stop the spread of the Flood by eliminating all sentient life in the galaxy.
Known Monitors
Images
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