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, preferring to use his intelligence. Despite being good at many things, Dee is shown to struggle with picking up playing the guitar. This frustrates Dee, and after an argument with his father, he decides to give up on trying to learn guitar. It is also implied he has a history of blackmailing students.