Sergeant Major Derolt Carnas was a salarian STG operative and the CQC expert of Captain Jerogar Derito's Lima Squad. Born on the asari world of Enigamas, Carnas was a fighter, often being harrassed by asari and other species due to his minority status.
When he was sixteen he joined the Salarian Special Tasks Group, becoming a skilled and valubule CQC (Close Quarters Combat) expert. He was assigned to Lima Squad in 82 CE. His first operation there was the investigation of a blacked-out comm base.