Thorian Zarrino is an easily recognizable man. His detailed red robes and modifications mark him clearly as a member of the Adeptus Mechanicus, a revered Tech-Priest. Thorian is over six feet tall and his mantle and the mechadendrites make him a hulking and intimidating sight. The tech-priest has three mechadendrites, each clearly different from the others. One has assortment of tools in the end of a lithe body, the second has a coil of cables as its noticeable feature. The last one is heavier than the others, looking like an industrial grade lifting claw with great pincers.

His head is shaven clean, though it is not that often he will remove the hood for it to show. The lower part of his face is covered in the typical machinery. Even his eyes are grey as steel and the gaze seldom betrays any emotion.

Thorian usually speaks in a neutral manner, though excitement can be heard when the discussion turns into the holy machinery, especially ground faring vehicles. The Tech-Priest walks in a calculated manner, like he is careful to avoid breaking anything around him with his big frame. In addition to the extensive modifications all of the priesthood of Mars share, Thorian's whole right arm is replaced with an astonishing bionic replacement.

When on a mission outside the Skíthblathnir, Thorian wears light carapace armor under his robes, and an assortment of equipment and tools in a big sling bag. The tech-priest is formidably armed, carrying his boltgun and a magnificent power axe. Also, his servo skull B-0B can be seen hovering near him, occasionally sprouting binary.