The body and accessories were taken from Crimson Guard's 25th.
This custom was made based on Crimson Shadow Guard v8 (2005). I think this black uniform is nicer than the red one, and gives a darker sight to this troop.
The Crimson Guards are known for their loyalty to Cobra Organization. These Crimson Shadow Guards are chosen among the best of the best, being part of Shadow Korps, a special unit subordinated directly to Cobra Commander.
They're responsible mainly for intelligence and also political missions. All of them must have at least 4 years in any Cobra Special Operations Unit, speak at least 3 different languages, be any martial art's black belt and be an Intelligence expert.
Shadow Korp's the right arm of Cobra Commander, and the Dark Arm of Cobra Organization.