The Autonomous Peace-Keeping Force, or A-Laws (アロウズ, Arōzu), is the primary antagonistic organization of the second series. Officially, their mission is to further unify nations by rooting out anti-government resistance. But their ideals and tactics are a facade of brutal oppression. Their actions trigger the emergence of some anti-Federation forces, like Katharon, and Celestial Being, which returns after four years. Many characters from the first series join the A-Laws, including Graham Aker (as Mr. Bushido), Billy Katagiri, Soma Peries, Patrick Colasour, Kati Mannequin and Louise Halevy.
- Louise Halevy (ルイス・ハレヴィ, Ruisu Harevi)
- In the first series, Louise Halevy is Saji Crossroad's girlfriend and classmate. She becomes an acquaintance of Setsuna F Seiei when the latter becomes Saji's neighbour. While Louise is attending her cousin's wedding, Gundam Throne Meister Nena Trinity attacks the wedding party killing Louise's entire family and causing Louise to lose her left hand, which is unable to be regenerated due to the red GN particles. After the attack, broken mentally, Louise breaks off her relationship with Saji so that he can be free to pursue his dream of working in space.
- In the second series, after receiving an artificial limb, Louise becomes a member of the A-Laws after Regene Regetta escorts her from a hospital to meet with Ribbons Almark, who channels her intent for revenge and world peace and attempts to make her the first purebred Innovator with pills that enhance her physical capabilities despite the side-effect of causing slow bodily deterioration. She learns of Setsuna's connection with Celestial Being after meeting him at a party held by Ribbons. During the A-Laws' attack on Celestial Being's asteroid base, she discovers that Saji is helping Celestial Being and assumes that he has been with Celestial Being all along. Her hatred for Celestial Being grows, first after the reported death of Soma Peries and later when her commanding officer Barack Zinin is killed in action. After the collapse of the Africa tower, she learns that Andrei Smirnov killed his own father. Shocked by the revelation, she wonders if she could ever do the same to Saji. Louise almost crosses that barrier as she gains the mobile armor Regnant from Ribbons which she uses to kill Nena, falling under Ribbons's influence after her mental breakdown. During the final battle when she clashes with him until she sees him wearing the engagement ring he gave her and she faints upon being overwhelmed by her memories of them together. Setsuna Trans-Am burst wakes her up and apparently healed all the cell abnormalities thus granting her a healthy body again. At the season's epilogue and in the movie, Louise is once again in a relationship with Saji but is plagued by chronic PTSD. On the Gundam movie she seems to be turned into a quantum-brainwaves user singularly sensible as she is one of the first persons to be affected by the ELS approach, she later encourages Saji's decision to travel to the orbital ring and help on to its maintenance while the Earth forces battles the ELS invasion. Louise Halevy is voiced by Chiwa Saitō in Japanese and Kelly Sheridan in English.
- Andrei Smirnov (アンドレイ・スミルノフ, Andorei Sumirunofu)
- Andrei Smirnov is the estranged son of Sergei Smirnov and member of the A-Laws. Andrei holds a grudge against his father for not protecting his mother 14 years before the beginning of the second season and joins the HRL military and later the A-Laws to forge his own path. Andrei meets Louise Halevy and becomes protective of her, as he sees her more suited as a young girl than a soldier. After the AEU's orbital elevator collapse as a result of a coup d'état by the Federation's military, Andrei kills his father in a fit of rage when Andrei assumes that Sergei sided with the coup d'état forces. After Setsuna defeated him easily, he eventually comes to terms with his father's actions after his consciousness connects with the consciousness of Soma under 00-Raiser Trans-Am Burst on the climax of the final battle noting that both Sergei and Andrei failed at trying to understand each other, as his father didn't know hot to reach him and himself failing to understand how he father felt, there is when Soma finally goes to a dormant state as she also finally come to terms with the Colonel's death, allowing to Marie regain full control again as she finally feels the despair and grief that Andrei feels for his actions; in the epilogue, he continues to serve in the Federation army in relief efforts in order to live up to his mother and father's hopes and ideals of being a "Soldier that protects the civilians" for the world. In the Gundam 00 Movie, Andrei battled against the ELS with his mobile suit after the ELS threatened the well-being of mankind. In the final battle, he fights valiantly against an ELS GNX-IV and defeats the enemy, but the right arm of his GNX-IV is assimilated along with his beam rifle. He uses his GN Buster Sword to cut off the arm, and discovers an ELS carrier heading towards Earth. Activating Trans-Am, he slices the carrier a few times before a part of his suit is assimilated. He, along with a few of his comrades in GNX-IVs, then proceed to overload their GN Drive Taus with Trans-Am, and destroy the ELS carrier along with themselves and their MSs. Before his death, he sees his parents, and yells "I am a soldier that protect the civilians!" Andrei Smirnov is voiced by Tetsu Shiratori in Japanese and Brent Miller in English.
- Barack Zinin (バラック・ジニン, Barakku Jinin)
- A former member of the Union army and captain of his own platoon, Barack pilots the newly developed GNX-704T Ahead and is responsible for the extermination of anti-government forces, mostly Katharon. His wife was killed shortly before the commencement of the second season after being involved in one of Katharon's anti-Federation terrorist attacks. Initially looking down on Louise Halevy, Barack often shows a great concern for her due to her young age, often chastising her for her reckless behaviour on the battlefield. He is eventually killed by Setsuna after the 00 Gundam docks with the 0-Raiser, and is later promoted posthumously to lieutenant colonel. His passing causes a significant amount of grief in Louise. Barack Zinin is voiced by Tetsu Inada in Japanese and Mark Gibbon in English.
- Arthur Goodman (アーサー・グッドマン, Āsā Guddoman)
- A fat man with curly blond hair who holds a high position within the A-Laws. He initially appears in the epilogue of the first season, next to Kati Mannequin in the Federation lineup, but is not introduced proper until second season. He overlooks the A-Laws' operation against Katharon, and is highly interested in Barrack's and Louise's encounter with Gundams Exia and Seravee, stating that "more equipment" is required. He is later seen in a conversation with Kati Manneqin and Arba Lindt. After Lindt's defeat to Celestial Being, Arthur orders that the command be given back to Kati Manneqin, telling them that failure is unacceptable in A-Laws. He is one of the A-Laws officers present in the A-Laws party. He is later seen leading the operations to obliterate the Suille Kingdom, destroy the Africa Tower along with the coup d'etat forces, and attack Celestial Being using the Memento Mori weapons. He is also seen at the speech of the ESF President, and later after the operation in episode 19 to wipe out the Gundams and the Ptolemaios II, mocking Healing Care for her failure to carry out the operation, and also decrying the decision to give her and Revive licenses. His assault, however, fails due to an uprising led by Kati Mannequin aiding Celestial Being and Katharon, with Setsuna killing Goodman. Arthur Goodman is voiced by Hisao Egawa in Japanese and Jason Simpson in English.
- Homer Katagiri (ホーマー・カタギリ, Hōmā Katagiri)
- The uncle of Union member Billy Katagiri. He is the commander of the A-Laws. He also has a secret connection with the Innovators. When his nephew, Billy, is recruited into the A-Laws, he installs him as an MS Technical Chief and tells him that he has high hopes in him. When the 00 Gundam destroys the ship led by Lee Zhejiang to stop the Ptolemaios II from escaping to space, Commander Katagiri reluctantly decides to accept the aid of the Innovators in order to defeat Celestial Being and prevent further sacrifices. The Innovators soon deployed in the A-Laws as licensed officers, with new, powerful suits to combat the Gundams.
- After the Ptolemaios II destroys the superweapon Memento Mori, the Federation government grants the A-Laws direct control of the military to further increase security. However, Homer fears that public support will eventually go to the anti-government force, Katharon and tasks Brigadier General Arthur Goodman to handle Celestial Being. His fears later realized when a number of dissidents in the regular army, led by Colonel Pang Hercury, occupied the AEU's orbital elevator. Worried that Katharon activities will increase, Homer orders Commander Kim in the regular army to send Sergei Smirnov on a top secret mission to ask the dissidents to surrender. When negotiations fail, Commander Katagiri sends Goodman into space to use another Memento Mori to completely destroy the elevator. At the end of the season, failing to defeat Celestial Being and after news of the A-Laws disbanding was broadcast, Homer commits seppuku rather than facing charges. Albeit his ruthless ways he in truth seeks to achieve the world peace but he was delusional, attempting to charge himself with all the sins and sacrifices intended to achieve that goal, this is thwarted in the end when Ribbons Almark, A-Laws and the Innovators are defeated in the last battle. Homer Katagiri is voiced by Ryūzaburō Ōtomo in Japanese and Brian Drummond in English.
- Arba Lindt (アーバ・リント, Āba Rinto)
- A man with a slightly wrinkled face and a head of grey hair, he is shown to be arrogant and overconfident in his abilities. Kati Mannequin recognizes that he is known for search and destroy type operations. He commands the attack on the Celestial Being flagship, Ptolemaios II, but his strategy was thwarted by Celestial Being's tactical forecaster, Sumeragi Lee Noriega. He and his crew would have been killed by the 00 Gundam, if not for the timely arrival of Mr. Bushido. After his defeat and the loss of Trilobite, he is forced to give command to Kati Mannequin. When the A-Laws headquarters decide to attack the Katharon base with the automatons, he simply tells Kati that there is no need to feel sympathy for them. After Soma is declared KIA, he gives the Ahead Smultron to Louise Halevy. During the strategy planning, he prepares a squad to follow his plan, but Kati Mannequin changes part of it. He is among the A-Laws members who lead the Memento Mori operation. Lindt is killed after the ship under his command is caught in the explosion of Momento Mori station One. Arba Lindt is voiced by Kazuki Yao in Japanese and Andrew Toth in English.