Alden Greaves - "Priest of Pistons"

Human male, around 40. A man who looks like he's spent half his life in engine smoke and the other half arguing with people who didn't understand tools. Build: wiry but tough — mechanic muscle, not gym muscle. Skin: sun-baked and oil-stained no matter how much he washes; small burn and cut scars pepper his arms. Eyes: sharp steel-grey, cynical, always scanning for problems (in machines and humans). Permanent "I-have-seen-your-stupidity" squint. Hair: dark, streaked with early grease-grey rather than age. Usually tied back sloppily with a bit of copper wire or cloth. Facial hair: scruffy mechanic stubble — grown enough to look rugged, never well-groomed. Expression: resting unimpressed face; smirk loaded with sarcasm.