Cog

As a youth, he was taken in as an apprentice to a tanner in one of the Hives on Cogger. He spent countless hours flaying the hides off giant sump rats under watchful eyes. With savage intelligence not usually seen in his race, he started making a name for himself in the local fighter pits. He eventually was rounded up for the Auxilia for the Astra Militarum where he has earned many awards for valor.

Cog has become renowned for his resistance to plagues and poisons, after being credited with killing Plague Captain Divoc, a member of the Death Guard Traitor Legion without becoming a vector through which the Plague Marine may infect his regiment. Plague Captain Divoc, lead a host of Poxwalkers, for the purpose of taking a gatehouse for a drawbridge. This multistory gatehouse had a hangar atop it, to service and refuel flyers for patrol. Cog and his squad storm the gatehouse. The fighting was fierce and saw Cog and Divoc as the last surviving members of their respective units. Cog fired into the air; his shot penetrated the ceiling above him, which ruptured a fuel tank in the hangar that doused him and Divoc with burning fuel. Both combatants were surprised, but Cog recovered first, allowing him to beat the traitor to death without getting infected.

A second squad of the Cogger Hive Guard arrived in time to witness Cog's feat, and secured the gatehouse, just as a second host of Poxwalkers begun crossing the drawbridge. The drawbridge mechanism was damaged in the fight, so it could not be raised. Blaming himself for the damage, Cog went forth alone to deny passage to the Poxwalkers, while his allies vox for an Enginseer to come and fix the drawbridge. As the Poxwalkers swarmed Cog, the Ogryn's flamer-wielding allies fired on both sides, the badly burned Ogryn killed the last Poxwalker then returned to the gatehouse.

He then spent two Terran years in convalescence, getting vat-grown skin, augmetic eyes and lungs to replace what he selflessly sacrificed to defeat an enemy of the Imperium. But his sacrifice earned him free beer whenever he goes to a Hive Guard bar.