Gregor is usually considered as easygoing and casual compared to the rest of the sinners. He has medium-length brown hair tied into a short ponytail, golden brown eyes, and half-rimmed glasses upon his nose. Gregor tends to lighten the mood through jokes, and has quite a habit of smoking. His right arm is an large insectous claw-like appendage which he tends to cover with his jacket. He sometimes tends to be cynical. If required, he uses his claw-like arm -- "UNGEZIEFER" -- as a weapon.