The ASW-G-08 Gundam Barbatos stands as the principal mobile suit featured in the inaugural season of the Mobile Suit Gundam IRON-BLOODED ORPHANS anime, under the skilled piloting of Mikazuki Augus. Originating from an era known as the Calamity War, approximately 300 years ago, the ASW-G-08 Gundam Barbatos is one of the legendary 72 "Gundam" frames that were manufactured and actively utilized during that tumultuous period.

Initially recovered and repurposed by Chryse Guard Security as a power reactor, the Gundam Barbatos underwent a significant transformation. Facing the challenge of a missing cockpit upon discovery, a new cockpit reminiscent of the CGS mobile workers' design was integrated before its subsequent deployment by the 3rd Group. Over the centuries, the Gundam suffered from neglect and poor maintenance, resulting in degradation of its armor and a diminished combat potential.

A pivotal moment in the Barbatos' narrative unfolds when Teiwaz technicians intervene. Tasked with restoration, these skilled professionals not only returned the Gundam to its original aesthetic glory but also reinstated its combat capabilities, bringing it close to its original performance standards.

Key to the extraordinary energy output of Gundam units like the Barbatos is the possession of two Ahab Reactors. However, due to the complexity of running them in parallel operation, only a limited production of 72 Gundam frames was ever realized. The pilot shoulders a substantial burden arising from the high output and maneuverability, a challenge partially mitigated by inertial control facilitated by Ahab Particles generated during a phase transition inside the vacuum device of the reactor. The strategic placement of the cockpit structure in front of the reactor optimizes the advantage of this unique design.

Among its counterparts, the Gundam Barbatos stands out for its emphasis on versatility. Tailored to adapt to diverse circumstances, the Barbatos can exchange equipment, and its adaptive nature extends to incorporating weapons and armor salvaged from defeated adversaries, enhancing its overall combat prowess.