Dirk Dennett

Dirk Dennett is a bully at Robert E. Lee Junior High. He is described as a jerk, earning the nickname of "Dirk the Jerk." Ben mentions that he used to get harassed by Dirk daily. Even though Dirk isn't the toughest bully in the school, he makes up for it by being the meanest, and would harass Ben every chance he got.

In Evil Spy School, when Ben returns to normal middle school, Dirk approaches him with the intention of shaking him down like he used to. When Dirk attempts to attack Mike, Ben stops Dirk and beats him in a fight in the school cafeteria, impressing Elizabeth, Chloe, and Kate.