Dexter is an extremely intelligent boy (a self described "Boy Genius") who has been creating fantastic inventions since he was a baby. He considers Albert Einstein to be his greatest influence. He is normally in conflict with his sweet sister Dee Dee. Dexter, though highly intelligent, often fails at what he has set out to do when he becomes overexcited and makes careless choices. He manages to keep the lab a secret from his clueless, cheerful parents, who amusingly never notice any evidence of the laboratory, even when it was right before their eyes. Despite coming from a typical all-American family, Dexter speaks with a Russian accent. Dexter's favorite superheros are Major Glory, Action Hank, Batman, Iron Man and Monkey (not realizing that Monkey is in fact his own lab monkey). Despite his great genius, Dexter is in fact very naive and occasionally very ignorant about certain subjects to the point where it seems like he lacks common sense; such examples of are his ignorance to the nature of girls, classic arcade machines and matters relating to nature, having not even known about famed biologist and friar Gregor Mendel the discoverer of DNA until Dee Dee told him, which clearly shows that despite his vast capabilities, Dexter is still a young and inexperienced child who lacks wisdom and experience. Dexter also has a huge ego which often clouds his judgement and has caused him to make rash and often morally questionable decisions.

An impression of Christine Cavanaugh or Candi Milo would be fitting.