Jak

Jak was a Covenant Jackal stationed aboard the Pillar of Autumn crash site during the events on Installation 04. After a raid by the ODSTs led by First Lieutenant Melissa McKay, he was assigned to inspect and haul cargo coming into the crashed vessel for use by the Covenant who occupied it. This was to make sure that Flood did not infiltrate the vessel.

He was placed under the command of Yayap, after the Grunt arrived at the site following a failed battle at Alpha Base. He did not like the Grunt, calling him a "Gas Sucker." Nevertheless, he complied with Yayap's orders because he had no choice. He, along with Bok and Yeg tried to make Yayaps life difficult, nonetheless.

After Bok was killed by a group of Flood hiding in a cargo pod, Jak suddenly became much more respectful of the Grunt. It is unknown what happened to Jak, although it's highly likely that he was killed when the Master Chief detonated the Pillar of Autumn and destroyed Installation 04. He may also have been killed during the Chief's infiltration.