ASW-G-66/XX Gundam Kimaris/Trooper/Gundam Vidar

The Gundam Kimaris is the 66th of the 72 Gundam Frames created by Gjallarhorn near the end of the Calamity War to counter the threat of the powerful mobile armors such as Hashmal. It was piloted by the first generation Sir Bauduin, who played a key role in ending the war. Thus, the Kimaris was seen as a heroic mobile suit and Sir Bauduin's stellar achievement made the Bauduin family one of Gjallarhorn's renowned Seven Stars. After the war, the Gundam participated in various ceremonies as a Gjallarhorn symbol and became famous. However, it faded out of people's memory as three centuries passed. In PD 323, Gaelio Bauduin pulled the Gundam Kimaris out of the family's treasury to battle the ASW-G-08 Gundam Barbatos. This is also the first time that the Kimaris is deployed in combat since the end of the Calamity War.

Gaelio's first battle using the Gundam Kimaris occurred in the space region surrounding the Dort Colonies. With its hit-and-run tactics, it managed to give the Gundam Barbatos a hard time. However the battle between the two Gundams was interrupted when the ASW-G-11 Gundam Gusion Rebake arrived to support the Barbatos, and deflected Kimaris' Gungnir lance with its shield. Kimaris then fought both Gundams, but it was evidently at a disadvantage and was forced to retreat when the main Arianrhod fleet arrived at the scene. Determined to defeat the Barbatos, Gaelio equipped the Kimaris with the Kimaris Booster, and engages the Barbatos for the second time when the Tekkadan tried to enter Earth's atmosphere. However, the Kimaris' hit-and-run attacks with its Gungir lance were soon neutralized by the Barbatos' chest reactive armor, and the lance was thrown aside by Barbatos. Kimaris then continued the battle using its combat knife, but was eventually blindsided by Barbatos' arm mortars. The vulnerable Kimaris was then attacked by Barbatos with the Gungnir lance, but Ein's Schwalbe Graze‎‎ took the hit instead. The Barbatos then left as Gjallarhorn's reinforcement arrives, and Gaelio moved the Kimaris closer to the Schwalbe Graze to care for the injured Ein.

With the Tekkadan finally arriving on Earth, Kimaris was retrofitted with an alternate set of armor for ground combat and became known as ASW-G-66 Gundam Kimaris Trooper.

Following Tekkadan's arrival on Earth, Gaelio equipped the ASW-G-66 Gundam Kimaris with an alternate set of armor for ground combat and it became the Gundam Kimaris Trooper. It debuted during a rescue operation in Alaska to save Carta Issue and her EB-06rs Graze Ritter Commander Type after the latter was heavily damaged by Mikazuki Augus and his ASW-G-08 Gundam Barbatos. Gaelio however was too late, and Carta died on their way home.

At the outskirts of Edmonton, the Kimaris Trooper fought Mikazuki and the Barbatos again. After fighting for a while, Mikazuki left to protect Kudelia Aina Bernstein, Atra Mixta and Orga Itsuka from the EB-AX2 Graze Ein. Gaelio was then left to face a new enemy, the V08-1228 Grimgerde. Gaelio was shocked to find that the Grimgerde was piloted by his friend McGillis Fareed. Gaelio then attacked McGillis when he learnt that McGillis not only sided with Tekkadan, but had also manipulated him, Ein and Carta to further his own agenda. Despite the Kimaris Trooper's fierce attacks, none of them managed to damage the Grimgerde. The battle concluded when the Kimaris Trooper was disabled by Grimgerde via a stab in the chest. According to official records, the damaged Kimaris Trooper was recovered after the battle and returned to the Bauduin Family. In actuality, the Kimaris Trooper was brought to the Outer Lunar Orbit Joint Fleet (aka Arianrhod Fleet) and under the orders of Rustal Elion, it was overhauled into the ASW-G-XX Gundam Vidar.

The Gundam Vidar is first deployed in 325 P.D after a lengthy period of repair and maintenance. It first sees action against rebels in the space colonies who were seeking independence from the Oceanian Federation. It is later deployed alongside Julieta Juris' EB-08 Reginlaze to Mars to investigate the mobile armor Hashmal, as well as what happened to Iok Kujan's team as they lost contact with the Arianrhod fleet. On Mars, the Gundam Vidar briefly confronted McGillis Fareed and Isurugi Camice before leaving to meet with Iok and Julieta.

The Gundam Vidar would last see action during McGillis' coup d'etat of Gjallarhorn. After understanding McGillis' reasons behind reforming Gjallarhorn, Vidar challenged him to a duel, but was interrupted by Mikazuki Augus in the ASW-G-08 Gundam Barbatos Lupus Rex. After a brief battle, Vidar retreated back to the Arianrhod fleet's flagship where it would be upgraded into the ASW-G-66 Gundam Kimaris Vidar.