Greb is a little under 3 1/2 feet tall, and might weigh 40 lbs soaking wet. He wears simple clothes, a sleeved shirt and pants with a hole for his tail, with a big, round and toothy head.

He carries a bandolier of daggers, a club at his belt, and a sling in a bag of bullets.  He has black hair and green eyes, and a prehensile tail that is used to getting into mischief.

He sometimes capers as he walks, or brachiates with all four limbs and tail. His fluid motions sometimes frame a swagger, as he has confidence in his abilities.

There is little apparent muscle in his slight frame, but he moves fluidly like a snake and can climb faster than he runs. He tends to speak in short, clipped phrases, as if he is new to the concept of languages.