If Master Jason was the one who taught me about the wonders of control and precision, and Master Chen taught me how to use my sword, then it was Master Miller who trained me how to harness my power. Like myself Master Miller was a Reploid. A Reploid is someone who was born with an extremely deep shockhaven well, even deeper than that of an immortal, for the purpose of powering cybernetic additions such as prosthetic limbs and a unique type of battle armor that is powered completely by the wearers shockhaven. That armor was what Master Miller was considered to be a Master of. It was obvious from the way he taught that I wasn't his first student however I was the first immortal, reploid hybrid that he had instructed. Hybrids have the combined shockhaven well depth of both immortals and Reploids and it was Master Miller's task to teach me how to reach these great depths of power.
The most notable part of Master Miller's physical appearance had to be that he had only had one flesh and blood limb, which was his left arm. His right arm and both legs were fully prosthetic all the way to his torso. He was fit and bulky compared to me and the other Masters. He looked like he was in his early fifty's he had the look of a hardened soldier who had spent the better part of his life in war. After our first few training sessions it was rare for me to see him in anything other than his Reploid armor which covered his entire body and most of his face. Every suit is custom, but they all follow the same basic design. The armor covered the wearer from head to toe in plate titanium that varied from half an inch thick to nearly two inches thick in some places. The armor was fully flexible and was integrated with strength and movement assist, but every system inside the armor needed a constant supply of shockhaven energy to function. Depending on the wearer's choice the helmet's came in fully enclosed models with an internal display, or in an open face model with digital visor of transparent armor that had all sorts of different information and targeting overlays. It also came with retractable mouth and nose guards that came out from behind where the ears would be for extra protection.
Master Miller and I both preferred to wear open face helmets and trust our eyes more than the interior display of the full face models for combat. My armor was white like my shockhaven while Master Miller's was a reactive camo that, while my haven awareness and heads up display let me see him just fine, rendered him nearly invisible to the naked eye. Even though he was a Master, he had no interest in training me in one-on-one combat. Really he had no interest in the idea of one-on-one combat at all. "Your missions will never require you to face just one enemy. You will need to control the whole battle field, not just duel across it." he had said the first time that we met.