Lucius

Lucius was a second-generation "dumb" artificial intelligence created in 2520 to monitor and control different aspects of planetary defence on Jacinto following the supposed end to the Insurrection. Lucius' control room is located under the Delta-Nine Facility in Cedros. Lucius is also paired with a "smart" AI, Prescott who jointly control Jacinto's planetary defences.

Lucius was destroyed in 2552 when the Covenant had attacked the Delta-Nine Facility during the Siege of Jacinto.