From Halopedia, the Halo wiki
Early life and Covenant service
Chak 'Lok was born on Malurok on January 15, 2485. He would go on to serve in the Covenant military, as was the custom for all male Sangheili. Eventually, 'Lok earned a placed within the Seneschal order of the Evocati.
Before the fall of the Covenant at the end of the Human-Covenant War, Chak 'Lok defected and joined the Banished. Here, he enjoyed greater autonomy, and was instrumental in recruiting dozens of Sangheili Ultra divisions into the mercenary organization. As he was particularly adept in the art of interrogation and information extraction, 'Lok put these skills to use on agents of his former empire, collecting intel on strategic locations, targets, and assets that would bolster the Banished arsenal and expand its influence.
During the Installation 07 conflict, Chak 'Lok interrogated human POWs in a facility called the Tower. This immense stronghold was built specifically for the task of extracting information from these prisoners and acting as a central strategic analysis base, retrieving intel on several key locations on the installation, including the Conservatory. Once all valuable intel had been wrung out of the prisoners via the Tower's torture machines, 'Lok would send them on to the House of Reckoning. One of the captives held at the Tower was Spartan Hudson Griffin, who was taken prisoner following a failed attempt to assassinate War Chief Escharum. Chak 'Lok also tortured a captured combat medic, Lucas Browning, before handing the human over to the Harbinger, who expressed annoyance at the damage 'Lok had done to the prisoner.
After John-117 was confirmed by Banished leadership to have returned on May 28, 2560, Chak 'Lok set a trap by activating a distress signal within Griffin's armor, which the Weapon picked up and the Spartan predictably pursued. 'Lok ordered the facility put into lockdown when the Master Chief arrived and taunted him via hologram, claiming that the SPARTAN-II would never get inside the Tower. However, with the help of the Weapon, the Master Chief located the security building that controlled the lockdown, lifted it, and ascended into the main structure. John-117 eventually confronted 'Lok, who was torturing Spartan Griffin. The two dueled one-on-one and John-117, with the help of Griffin's recovered Threat Sensor, killed Chak 'Lok despite the latter using his cloak and an Energy Sword to his advantage. Unfortunately, it was too late for Griffin, who died from his injuries from the torture soon after.
Following Chak 'Lok's death, Glibnub, the Unggoy communications officer operating the Banished propaganda towers across the Halo, claimed that Chak 'Lok was still "100% alive" and that the Tower had simply been closed for "renovations." The Banished at the Forge of Teash, on the other hand, acknowledged the Tower's fall and put the blame entirely on Chak 'Lok. Bassus, the head of security at Site Novem, openly expressed delight at Chak 'Lok's death.
Personality and traits
Chak 'Lok often spoke in a calm, polite manner, even when addressing his enemies. However, he quickly dropped this demeanor once the battle started. 'Lok enjoyed torturing his prisoners both physically and mentally. Arrogant and prideful, he displayed no concern when the Master Chief attacked the Tower. He held a low view of humans in general, regarding them as being soft and easy to break. Like many Sangheili, he also viewed the Jiralhanae with contempt, though he was still a loyal follower of Atriox and later, Escharum. Chak 'Lok also regarded the Harbinger with a certain degree of reverence, viewing her words as "the truth".
List of appearances