Christina Mackenzie
Rank: Lieutenant Junior Grade
Age: 21
Height: 165 cm
Alias: Chris
Mobile suit: RX-78NT1 Gundam NT1
Al's former neighbor, who left Libot to attend the Earth Federation's military academy. Chris returns to the colony just before the first Zeon attack, and quickly becomes a surrogate big sister to her old friend Al. Her current assignment is as a test pilot, fine-tuning the Gundam NT1 and "training" its learning computer - a piece of information she keeps from Al, since the Gundam's presence at Libot is a top military secret.

Terry Sanders, Jr.
Rank: Sergeant
Age: 29
Mobile suit: RX-79[G] Gundam
In his previous assignment as a test pilot, Sanders has already become one of the Federation's first mobile suit aces. However, his skill as a pilot is accompanied by a grim jinx; each time Sanders joins a new team, his comrades are wiped out on their third mission together. When Shiro saves him en route to Earth, Sanders tags along and becomes a member of the 08th MS Team, hoping that his optimistic new friend can help him break his "Team Killer" curse. Loyal and serious, Sanders usually plays a support role in combat, carrying ammunition and spare weapons in his Gundam's cargo container.

Corp. Noel Anderson (ノエル・アンダーソン) — The operator of the Experimental Unit and the leading female protagonist in the Federation story. She is an expert on mobile suit combat theory. She is quite the "by the book" kind of person, and this often brought her to question Matt's pacifist stance. Although she disagrees with Matt on battle strategies in many occasions, she still shows great admiration for her captain. After the war, she is promoted to Ensign and has the chance to meet with the famous operator of the Pegasus Class Warship Thoroughbred, Miu Takizawa. She is also the Federation operator for the player for the PSP game, Gundam Battle Royale and one of the operators in the sequels Gundam Battle Chronicles and Gundam Battle Universe. One of the cut-scenes in the game imply that she might have a crush on player character. She is featured in the PS2 game, G Generation Spirits as an obtainable character.

Henken Bekkener
Rank: Commander
Height: 195 cm
This good-natured AEUG officer serves as the Argama's first captain, and his even temper and jovial demeanor give the rebel flagship a more relaxed atmosphere than under Bright Noa's command. Along with Blex Forer, Quattro Bajeena, and the junior officer Reccoa Londe, Henken forms part of the AEUG's initial core leadership. After Bright takes charge of the Argama, Henken transfers to the battleship Radish, from which he continues his shy courtship of the frosty Emma Sheen.

Ellen Rochefil
Profile:n/a

Nick Orville
This Anaheim Electronics engineer accompanies Nina aboard the Albion. Like many Anaheim employees, he's a treacherous fellow with dubious loyalties, and after the Albion arrives at Torrington he helps Gato infiltrate the base and steal the Gundam GP02A.

Rosamia Badam
Lieutenant Rosamia Badam is a member of the Titans and the first cyber-Newtype to appear in the series. She first appears when she was summoned to help Buran Blutarch attack the AEUG/Karaba transport Audhumla with her Gaplant as her opponents are flying over the United States.
Although she winds up being defeated by the combined efforts of Kamille Bidan, Quattro Bajeena, and Katz Kobayashi, Rosamia escapes with her life. Rosamia reappears many episodes later on Side 3's Colony 13, claiming to be Kamille's brother. Although Kamille knows she is not really his sister, he pities Rosamia and takes her back to the Argama, where she is examined by the ship's physician Dr. Hasan. Her tests show that she is a cyber-Newtype, prompting an immediate search by Dr. Hasan and Lt. Quattro. However, with a little help from Shinta and Qum, Rosamia commandeers a Nemo and escapes the Argama. Although she initially helped Kamille in battle (still thinking he is her brother) against her fellow Titans, she ultimately turned against him and went back to the Titans. She later fights Kamille again while piloting a Baund Doc, but he convinces her to land on Colony 13 and get out of the cockpit after she relapses into thinking he is her brother. The two of them have a heart-to-heart talk where Kamille tells her about Four Murasame and how she died. But then, Gates Capa and Loren Nakamoto quickly use mind control waves to make Rosamia hostile again. In the process, she nearly kills Kamille but Lt. Quattro intervenes, forcing her and the other Titans to retreat.
Rosamia appears one last time near the end of the Gryps Conflict piloting the Psyco Gundam Mk-II. By this time, she is under the impression that Gates is her brother and he sends her off on a mission to destroy the Zeta Gundam. Kamille senses her presence and sorties, wondering if the voice he heard belongs to Four Murasame. As soon as she spots Kamille in the Zeta Gundam, Rosamia engages him. Their fight ends with Kamille killing Rosamia but not before she reverts back to a child-like state and says, "Brother, I found you!" Rosamia Badam is voiced by Kayoko Fujii in Japanese and Jennifer Bain in English. In the anime film, she is voiced by Yū Asakawa.