This machine is equipped with a Lambda Driver and is based on a prototype of the M9 Gernsback, a super-high-performance third-generation Arm Slave said to be 10 years ahead of the rest of the world.
This AS was developed solely in the pursuit of incorporating black technology without any regard for productivity. Since its developer, Bani Morauta, has passed away, not only is the machine unable to be reproduced, but some of its components have also become black boxes, making it impossible to increase production. The machine's skeleton mimics the human nervous system, optimizing it for the first operator to pilot it. This setting cannot be changed even by resetting the AI "Al," meaning that no one other than Sagara Sousuke can operate the Lambda Driver.
Because it's based on the M9, it boasts some of the world's most maneuverable machines, and its basic performance is also at a high level, with weapons and standard parts being able to be reused from the M9. However, perhaps because its head was developed by a different manufacturer than the current model, it features a twin-eye sensor camera and a unique mouth hardpoint. Its appearance with the anti-tank dagger in its mouth is striking, and in the story it is described as "looking like a ninja holding a scroll in its mouth."
However, due to the "extra" Lambda Driver, it weighs 0.3 tons more than the M9 and has a weakness in that its maximum operational time is 50 hours shorter. Conversely, this shows that the Lambda Driver is worth the effort.
In the TRPG replay work "Andakava," it is revealed that multiple units have been produced by changing the specifications, excluding the black-boxed parts.