The Biomechanical Combat Suit (BCS) originated with the idea of a hardsuit which incorporates the tissue of the wearer into its framework, increasing the flexibility of the suit of the suit and the control the user has over it. The prototype model was built by Canopus and later perfected by Pollux.
To accomplish the meshing of the wearer and the BCS, special enzymes are injected into the wearer which causes their body tissue to grow into the various parts of the suit. The energy and material for this growth are supplied by the BCS. Similarly, when the suit is taken off, a second set of enzymes makes the tissue return to its original state.
The right arm of the wearer becomes a pair of blades while the left arm is left unchanged (though the muscular and skeletal strength of it are increased), so that other weapons can be carried. The suit increases the users speed and strength by nearly 300%, and future versions may also be able to enhance the wearer's mental abilities.
Since their production, BCSes have become the most popular hardsuit on Mars, and among the top ten most used war machines. Cassiopeia, the queen of Mars, has declared them to be "the greatest technological advance of all time," and even had one customized for her own use.