Thrash

Thrash (Subject 0139) is a tank bred Krogan as a part of the G-Project conducted by Doctor Malius and the STG science organization. He is currently serving as the Armory Chief aboard the SSV Jughead.

Background
Subject 0139 or "Thrash" was part of a experiment conducted by the STG Doctor Malius in hopes to amend for the genophage. Many tank bred Krogan were developed in the process, knowing that their blood would be loaded with antihistamines that could fight off the genophage.

The tanks containing Thrash and his 199 Krogan-kin were being transported on an STG vessel with Malius on board. The ship was sabotaged by a double-agent pretending to be C-sec and Thrash was the only surviving Krogan. The ship was sabotaged by the same Turian, who in was in turn killed by Thrash before he escaped via a lifepod and was rescued by the Crowbar, a ship led by Captain Yulith. It was here that Thrash met the then Lance-Corporal Thatcher who was using the ship as transport to get to Ilium.

Mass Effect: Resurgence
When Thatcher volunteered to investigate the distress signal sent from a mining settlement, Thrash decided to accompany him. Yulith's crew was arguing about wether or not to react to the call, thus sending Thatcher, Thrash and Situs was a compromise the crew accepted. Thrash fought off strange synthetics and saved what civilians he could, including a batarian (Kanin) that would become a close friend. Upon arriving on Ilium, Thrash was appointed the Armory Chief of the SSV Jughead as it was recently handed over to the now Sergeant Thatcher.

Thrash was the basis of the Jugheads original mission. Simply: "Get Subject 0139 to the Citadel and hand him over to C-Sec." After the Jughead helped the Unicorn from a attack from the same synthetics that were fought in the mining facility-- Surgeon diagonosed Thrash with a terminal illness. Thatcher found that curing the Krogan was more important than his transferal to the Citadel. A detour to Omega was in order to find a Doctor willing to operate on Thrash, which immediatly followed by the crew needing to find a donor on Tuchanka.

Thrash proved his skill on Tuchanka after fending off a baby Thresher Maw with a gattling gun, which in turn led him to finding a donor named Brum. The Jughead immediatly went to the Citadel where Thrash's fate was put in the hands of Thrasher and the Jugheads crew as a meeting with Ambassador Clyde managed to convince the Alliance and Situs managed to convince C-Sec to sign Operation 0139 to Sergeant Elijah Thatcher.