He seems to have a tendency to imitate what Murphy does. He may have a dark streak to him, as seen by his snowmen in Le Sculpteur Suprême. He is a short and slim 8-year-old mole with gray fur that wears a red and white baseball cap with the word “COOL” on it, blue shutter sunglasses, a short-sleeve red t-shirt with a light red thumbs up print, white pants, low-top black and white sneakers. Although Calvin is a mole, he has rodent like ears, suggesting that he may be a hybrid.