Reese Wilkerson

Reese is the older brother of the titular protagonist of "Malcolm In The Middle" and is also arguably a minor antagonist due to his extreme personality, which can vary from a slow-witted bully, mischievious trickster or (at times) a mild sociopath who does bad things seemingly for the sheer thrill of it.

Impulsive, often idiotic but also capable of coming up with surprisingly devillish plans when he wants to Reese is rarely liked by the other characters of the show (even his own family) due to his destructive and bullying nature.