Arius Draccius is an enormous figure, given bulk and height thanks to augmentation and powered armor added to his already sizable form. Caring nothing for aesthetics, his red robes of the Adeptus Mechanicus look frayed at the edges and are worn as a badge of office rather than out of true need.  His lower face is dominated by a vox-box replacing his lower jaw while his remaining flesh looks a necrotized gray.

His history, insofar one manages to extract it from him, is simple. He was grown on Krieg in an Adeptus Mechanicus enclave that services the dead, irradiated and toxic world's enormous soldier-rearing endeavors. Bred for intelligence and hardiness against the world's deadly environment, his first decades were spent maintaining bunkers, laboratories and the manufactorums of war. He assisted in the lethal soldier training regimens by providing war servitors, conveniently built from the fallen of previous training exercises. He ensured the sanctity of the lasguns and other weaponry the soldiers were provisioned met the Adeptus Militarum's standards. All in all, he lived servicing the great war machine that was Krieg.

And yet he longed for greater things and service. Upon reaching some seniority as a Tech-Priest, he applied for transfer to a Forge World. He stayed there but briefly, never truly finding his way among his peers who were born in the technological environs of such worlds. But his mind had been opened to the glory that was the Quest for Knowledge. To discover and learn had quickly become his passions. The galvanic currents of the Omnissiah had filled his frame. He adapted his frame and specialization to that of the Explorator and joined the efforts to map the mysteries of the unknown stars and join the holy quest for recovering the glorious purity of the past in the form of sacred archeotech. That he had to work with those burdened by flesh was of little concern to him.

In personality, Explorator Draccius is rather typical for those consumed by the Adeptus Machnicus' teachings. He strives for a coldly logical mind, unburdened by the weakness of the flesh leading him to making emotional decisions. There are few things that can break through his analytical mind, but the corruption of Chaos is one, a reminder of the grim fate of Krieg's heretical past indoctrinated into him. Friendship and comradery are alien to him. Only the glorious service to the Omnissiah matters to the Explorator.