Mack

Mack was a UNSC Agricultural Operations Artificial Intelligence construct serving planet Harvest in 2525 before and during the First Battle of Harvest.

Avatar
His chosen avatar is that of an American cowboy, exactly as those from old western movies from the 20th century. He usually has messy black hair and he wears cracked leather work boots, blue denim jeans, a gingham pearl-snap shirt rolled up to his arms, and a sun-bleached gray cowboy hat. He usually presents his avatar covered in dust and grease, to promote the idea that he has been hard at work. He is lighthearted and speaks in a western drawl.

Purpose
Mack was the AI in charge of all of Harvest's agricultural operations. These planetary operations included the control of the JOTUN harvesting devices which were used for planting, maintaining, harvesting and packing of agriculture on Harvest, as well as preparing the produce for its journey up Harvest's space elevators.

He worked with a separate AI, Sif, who was responsible for Harvest's shipping operations, as well as the Orbital Space Station Tiara and its seven space elevators.

He was well liked by the population of Harvest and was said to fill the role of "everyone's favorite uncle". He frequently helped the people of Harvest with their problems and offered free advice about a problem before it even becomes known to the citizen. During the evacuation of Gladshiem, he appeared alongside the people of Harvest to guide them, as his mere presence calmed and comforted them.

Flirting
He often would playfully "flirt" with Sif, eliciting strange responses in the female AI, seemingly of hate but tinged with an unexplainable feeling analogous to human attraction underneath. Eventually, he reveals to Sif that he is not one but two AI's, his counterpart being an AI known as Loki, originally the AI of the, a Phoenix-class Colony Ship which transported Harvest's first settlers.

Battle of Harvest
When the combined Covenant Army and Navy force pressed their attack on Harvest, he exchanged places with Loki, transmitting himself into the thousands of JOTUN machines while Loki moved into the alternate matrix in their shared data center. Loki shortly afterward managed to disable Sif using a military virus to render her nearly inoperational (Loki kept one cluster online as a means of, but she was later somewhat repaired by the alien Lighter Than Some.

Mack had made Loki promise to keep Sif safe, but Mack didn't entirely trust the PSI and kept a small fragment of his own logic in the data center. Loki broke his promise in the interest of humanity's security, believing Sif should be destroyed in order to prevent her data (including the locations of other human colonies) from falling into alien hands. When Mack discovered Loki planned to destory Sif, Mack (in the form of a small army of various JOTUNs) launched an assault on the reactor tower and the adjacent mass driver. He arrived as the evacuation of Harvest began and briefly assisted Staff Sargeant Byrne and his troops in defending the reactor tower, finishing off an attack by Brute Choppers. Mack immediately turned his attention on Loki; while the all-in-one JOTUNs hacked the maser dish and purged Loki's fragment from Sif's clusters, a combine pinned the mass driver's gimble to the ground, preventing it from firing into the Tiara and destroying Sif. Mack hoped to bring Sif down into his machines, but there was too much damage to her arrays (thanks to Dadab wrecking the data center with his Plasma Pistol). Sif (who has now gone rampant by her own understanding of the term) understands that Loki is correct in believing the Covenant will return to plunder her arrays even if the current attack is staved off, and manages to convince Mack to let Loki destroy her with the mass driver.

Mack witnessed Loki's destruction some time later when the Covenant destroy the reactor tower (including the maser dish and assumedly the mass driver).

Final Transmission
The ONI ship later records Mack's final transmissions, extremely disjointed and rampant words he transmits to the destroyed Sif as the Covenant burn his world. He continues to resist, but as his resources dwindle he makes a last desperate attempt to help his now destroyed "love" Sif by burying her fallen Space Elevators.

He says he will "Bury your strands so deep their fires can't reach them and glass them like the rest". His final words are a misquoting of Shakespeare, a habit he had that both annoyed and charmed Sif during their time together.

Although he knows Sif cannot hear him he claims it keeps him busy while the Covenant slowly destroy Harvest.

He was undoubtedly destroyed as he said that the Covenant were destroying his JOTUN's. They likely destroyed them all, and him along with it.

List of appearances

 * Halo: Contact Harvest