The Akatsuki Custom Battle Frame is a one-of-a-kind Aestivalis model designed specifically for Nagare Akatsuki, the chairman of Nergal Heavy Industries. When Akatsuki boarded the ND-001 Nadesico, he brought with him an Aestivalis model unlike any seen before by Nadesico's engineers or pilot crew. A custom design, built specifically for him, his Aestivalis has been fine-tuned and specifically-tailored to give him his maximum possible maneuverability and response time. Its thruster array, computer, and power systems are all entirely new, and the composition of its armor is classified.

The sleek design lacks the backpacks worn by traditional Aestivalis and other bulk. At home in space, air, and ground, this ace mecha is a superior machine for a superior pilot. It is a unique robot, and there are no plans to mass produce the unit.