So, for the description now.
What I have in mind is a SPY that equipped with unique nano-suit and training has special abilities to infiltrate, combat, assasinate, distract, trace and engage multiple enemy units without need of any additional weapons. This highly advanced technology enables him to scan surroundings for life forms and possible treats in terms of radiation, temperature, chemical change, etc. It works as a tracking system that once engaged, it will track any marked target within reach (360 degrees map, with rotation field of view). The suit also has multiple outlets for scanning, attack, probing, trap setting ect. They are mostly located at palm, knockles, knees, feet, elbows, head. Those outlets will analize or interact upon touch or will, giving different results. So, basically by the palm touch you can be poisoned, put to sleep, electricuted, ect. It can generate electrical fields to distort bullet trajectories.
Helmet has no distinctive facial features to conceil the field of view. The suit itself if environment adaptive, helping to camouflage the user.
The training in close combat, technology gives him the ability to utilise the environment for clean and stealth action.
After he's done, there are no leftovers of devices, weaponry and victims remain with increased decomposition rate to unable to establish the time and cause of death.
Basically, if you are to see him, it's the last thing you'll see.
Now, all of this I should be able to pull of by the end of the given time table. How about that? I should put ® by the idea, I guess.