Dr. Flug appears to be a cowardly man, even though he is not an actual wimp. He is very intelligent and inventive and seems to like to 5.0.5., as he considers himself a father figure to the bear. In contrast, he and Demencia are often seen bickering, which shows a mutual dislike on their part.

In his Orientation Videos for Villains series it is shown that he may have no problem with torture and threats targeted at children. He also appears to have somewhat of an ego when it comes to his intelli