The trenchcoat is an easy signifier but simultaneously worn our, threadbare. I'm thinking an office shirt gone mottled-brown with coffee-stains, wrinkles. Black tie. 5 oclock shadow. Salt and pepper colored hair. Slightly overweight. Suspenders, slacks.
IDLE: Slouching a little. One hand in pocket? Arm constantly twitching. Sparking. Jittering. Randomly reaches up to choke him. He whacks it away. Smoking?
Karl Carbon. Age 32. Ex-Cop. Ex-husband. Ex-human.
Maybe Det Bullock from Gotham, after he gets hung out to dry.