Craig seems like a very stoic, cynical, apathetic, and inexpressive guy, with a harsh personality compared to other people. Even with this peculiar personality, it doesn't mean he has no feelings, he just finds it difficult to show them. He has a habit of frequently flipping people the bird, even if there's no reason to do so. He himself has said that he only cares about his guinea pig (Stripe), and his boyfriend (Tweek Tweak). He's 10 years old.
Speaks in brisk, trade-worn phrases; punctuates with quick little grunts and reassurances.
