Dennis is an uncontrollable schoolboy who takes pride in causing chaos and mayhem to those around him due to his intolerance for rules and order. Such traits have caused some artists to consider him to be quite the villain. In such strips, Dennis would often prove himself to be quite selfish and greedy, often disregarding his friends in favour for treasures.[4][5] Despite this, he would often get his comeuppance in the end. His misbehaviour stems from what The Beano explains as an attempt to add excitement to an otherwise dull day. Often equipped with a red and black jersey and an array of menacing weaponry (such as a catapult), Dennis is considered to be quite the loner, seeking no solace in anyone's company aside from his faithful pet dog Gnasher.