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343 Guilty Spark

"Greetings. I am 343 Guilty Spark, moniter of installation 04."
— 343 Guilty Spark.

343 Guilty Spark, also known as the Monitor, the Monitor of Installation 04, or the Oracle was an AI construct of Forerunner origin, the primary antagonist of Halo: Combat Evolved and the secondary antagonist of Halo 3. He was the AI, Moniter, caretaker, guard, and historian left to watch over installation 04 and its contents when the Forerunners departed.

As with UNSC and Covenant Artificial intelligences, Guilty Spark's programming prohibits certain actions outside of his function. He cannot, for example, retrieve the Index from The library or unify it with the Core, instead needing a Reclaimer to carry out this task.