Absolute Defense Field

The Absolute Defense Field, or AD-Field, is a barrier that BST-Frames can generate for defense or, in special situations, movement or even offense.

Overview
The AD-Field is a barrier that is usually invisible until it comes into contact with other objects. They are primarily used as a powerful defensive shield that is impenetrable by normal means. The mechanics of the AD-Field are not entirely understood, and no singular power source seems to be the origin of the AD-Field. Instead, the AD-Field seems to be generated naturally throughout the entire frame, the unknown material the BST-Frames are made of serving as the conduit for the AD-Field. This is further established by the fact that during The Beast, the BST-Frame's armor segments separate to reveal a glowing frame underneath, which further increases the power of the AD-Field and presents more uses for the field, such as for movement and even for offense. It would seem that the AD-Field is integrated into the BST-Frame by the very nature of its construction, with the system being integral to the frame's operation.

The only known thing that can effectively defeat an AD-Field is the AD-Field of another BST-Frame, which, when resonating at the same frequency as an opposing AD-Field, will cancel each other out, nullifying the AD-Field for a short time and allowing attacks to slip through. Aside from this, it would seem that energy weapons in general have the greatest effect on AD-Fields, and while it still takes a great amount of power for a weapon to breach the barrier, it is possible to whittle down its power through persistent attacks and eventually break it, though during The Beast the field becomes virtually inpenetrable.