Herbie, not the brightest fellow in the world, essentially does whatever his partner tells him to do in any given situation. Like Blue Lightning, he will seek escape when confronted with a fight, but will turn to brute force if he must. He is much more comfortable with violence than his partner, although he does not derive any pleasure from it.

Very protective of his "little friend," Herbie will attack with a single-minded, berserker fury anyone who causes Lenny serious injury.

Emotionally needy, Herbie has a tendency to latch on to and be dominated by people with stronger personalities than himself (at present, this would be Lenny Boosler, the Blue Lightning). He is also somewhat simple, and can usually be taken advantage of by unscrupulous individuals, or talked into doing something against his better judgement (what little there is of it).

A quiet person, Herbie hardly ever talks, except in answer to something his partner says, and almost never discusses himself. In fact, his past is considered a closed subject, and even his partner Lenny knows almost nothing of Herbie's history before they first met. Herbie is basically good natured. . . until Lenny tells him it's time to be mad-dog mean, that is.

As the Midnight Revenger, he wears steel-toed, black leather workboots, loose fitting black canvas pants, a thick black leather belt with a large steel buckle in the shape of a blacksmith's anvil, a black tee shirt; a black leather motorcycle jacket (reminiscent of the one worn by Brando in "The Wild One") with the initials M.R. crudely emblazoned in gold paint on the left shoulder, and a leather face mask, similar to the variety worn by professional wrestlers, yellow with black-bordered rectangles cut out around the mouth and eyes.