Zarvok Threx stands on four wasp-like legs, each jointed limb ending in hooked black tarsi that click against stone as he walks. His broad lower abdomen hangs behind him like a lacquered reliquary, striped in dull sulfur-yellow and oil-black bands, with a narrow seam that opens when he deploys chemical sprayers or stores delicate instruments. His upper body is vaguely humanoid, though stretched and angular, with two unnervingly thin arms ending in long, dexterous hands made for soldering, incision, and disassembly. Two sets of mandibles frame his mouth. The outer pair are heavy and serrated, while the inner pair are small, pale, and almost human in their careful movements. His wings are translucent and veined with violet light, but one wing beats slightly out of rhythm, giving his flight a lurching, impatient quality. His chitin is polished around the shoulders and abdomen from centuries of handling tools, while the legs are roughened by void dust and corrosive portal residue. The unexpected softness of his appearance is a small woolen scarf tucked beneath his thorax plates, knitted in a child's uneven pattern. Zarvok treats it as a practical thermal garment and becomes violently evasive if anyone asks who made it.