Bok

Bok was a Kig-yar soldier who served in the Battle of Installation 04 during the Human-Covenant War.

Battle of Installation 04
Bok was stationed aboard the crash site during the events on Installation 04. After a raid by Marine Shock Troops, led by 1stLt 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, didn't infiltrate the vessel at all.

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

Death
One of the containers, he opened contained a group of Infection Forms and Combat Forms. As he opened the container, they jumped out and infected him, but the other Jackals and Yayap killed all the Flood and Bok before they could cause any harm.