Zarraek is a long range specialist who, along with Emesh, was specially trained. Zarraek's training dealt with handling COG soldiers in the most effective manner, being able to operate COG machinery, and even being able to perform espionage. However, Zarraek was only able to attend every training course save the espionage due to being a former shock troop. This Theron Guard spread out from the Locust Stronghold and climbing out of Emergence Holes to travel to outposts as a scout. He is the leader of his platoon.
Zarraek was once a shock trooper for the Locust and assisted in the mass chaos and destruction of E-Day temporarily, only to return to the Hollow, giving him his life once the COG used their particle beams and chemical weapons.