Watchdog Man is a young-looking man with a blank and uninterested look on his face. He dresses in a full-body dog suit with a red collar, with his face showing where the dog’s mouth should be.

Watchdog Man has been shown to be very blunt and nonchalant. He also has a habit of wearing his costume all the time, even keeping it on when he bathes. His table manners are also bad since he eats like a dog and is never seen using a fork or spoon. He acts like a dog at all times, speaking sparingly, sitting on his haunches while alert or loitering, and curling up in a dog bed while asleep. He takes a stance on all fours while fighting, rather than standing upright to confront enemies.

Like a loyal and well-trained dog, he is solely interested in protecting his territory. Though he solely performs his hero duties there in Q-City, he relentlessly hunts down and dispatches any mysterious beings there, ripping them apart as quickly and savagely as he’s able. He often piles up and perches atop the corpses of the mysterious beings that he kills.