Lt. Col. Jack Halle is a commanding officer within the Congressional Armed Forces, the military arm of the Congress of Settlement Nations, or CONSENT, in the Universal Century year 0223. He was formerly the superior officer of Mark Curran before Curran left the service. Halle is portrayed as a sadistic and jealous individual who is willing to disregard the lives of others to achieve his own objectives. His personality is marked by ruthlessness and a willingness to use underhanded tactics, such as framing Mark for the murder of a CONSENT soldier—a crime Halle himself committed—in order to pursue his quarry. He leads the raid on the Hydro-Gen research facility and is tasked with hunting down the Gaean rebels and recovering the bioluminescent enzyme that could solve the ongoing food crisis. Halle pilots the CAMS-13 MS-Rai mobile suit in the final battle against Mark Curran, piloting the G-Saviour. His role in the story is that of a primary antagonist on the military front, acting under the orders of General Garneuax. He is driven by personal jealousy toward Mark and a desire to maintain his position of power. He shows no hesitation in using lethal force, as seen when he orders a firing squad to execute Cynthia Graves after she surrenders. Throughout the narrative, Halle remains a static adversary, motivated by ambition and a lack of empathy. His key relationships include his tense history with Mark Curran, whom he once commanded and now pursues relentlessly, and his subordinate role to General Garneuax, whose overarching plan for selective starvation he supports. Halle’s notable abilities include his tactical command of CONSENT forces and his proficiency as a mobile suit pilot, though he is ultimately defeated in combat by Mark and the G-Saviour, leaving him incapacitated and leading to the withdrawal of CONSENT forces from Gaea.