Chiss Commando

Chiss Commandoes were elite fighting troopers that first appeared during the Chiss Ascendancys war with the Killik species.

They were deployed on specialist tasks such as the placement of vape charges on selected locations. They wore an armour that matched their appearance to their surroundings allowing them to sneak across the battlefield easily. They did not fear death and were known to die willingly should it be required.

Source

 * Dark Nest III: The Swarm War