Dee is fairly serious, and also very mean even when he isn't provoked. He is very sarcastic and a good liar. He is shown to have a nonchalant approach to things throughout the show, prefers to use his intelligence to his advantage rather than strength unlike his mother or brother. He will help other students cheat on their exams in exchange for money and defending his younger brother, Heavy, from Gopher. This shows us how he uses his intellect to make money & benefit himself.