George is an outgoing and talkative fourth-grader at Jerome Horwitz Elementary School. He serves as the primary writer for the comic books he creates with his best friend. His spelling abilities noticeably improve as he grows from first to fourth grade. He struggles with impulsive behavior during class hours.

Harold is an artistic fourth-grader attending Jerome Horwitz Elementary School. He acts as the sole illustrator for the comic series, developing his drawing skills significantly over the years. He prefers inventing monsters and superheroes over completing traditional schoolwork assignments.

Dog Man is a chimeric superhero who protects his city using heightened canine senses and human physical strength. He possesses high intelligence and an eagerness to please his superiors at the police station. Because he cannot speak, he communicates through licks and struggles to control hyperactive dog behaviors.

The Chief is a gruff police commander managing the local law enforcement station. He demands strict adherence to the rules and regularly loses his temper when his personal property gets ruined. Despite his loud yelling and harsh discipline, he genuinely worries about the officers under his command.

Petey is a bipedal orange tabby cat who builds illegal gadgets in a secret laboratory. He frequently breaks out of a specialized feline prison to execute malicious schemes across the city. His inventions range from giant machines to chemical sprays that animate food.

The Mayor is a corrupt political leader aiming to seize total control over the city. She establishes illegal businesses and replaces human law enforcement with mechanical alternatives to enforce her agenda.

Officer Knight is a physically capable human police officer who lacks basic intelligence. He desperately wishes to perform heroic acts to impress his superiors before a severe explosive injury alters his physical form permanently.

Greg is an intelligent police dog trapped in a fragile physical frame. His intellect and sharp sensory capabilities form the mental foundation of the city's greatest superhero after a devastating accident.

Dr. Scum is an unethical scientist working out of a large industrial factory. He builds malicious inventions and establishes criminal enterprises to support local political corruption.

Ms. Construde is a strict first-grade teacher at Jerome Horwitz Elementary School. She actively suppresses artistic expression in her classroom, viewing comic book creation as a severe behavioral issue requiring medical intervention.

Principal Krupp oversees the daily operations at Jerome Horwitz Elementary School. He frequently clashes with the student body and inadvertently becomes a chaotic costumed hero due to a hypnotic plastic ring.

Robo-Chief is a giant, spiked robot wearing an oversized police cap. Built to enforce a corrupt political agenda, it causes massive property damage and follows direct commands until a cunning trick causes it to malfunction.

The Hot Dog is an animated food item that initially seeks friendly companionship upon gaining life. After facing cruel rejection from its creator, it forms a miniature army of other sausages to wage war against the human population.

Philly is an anthropomorphic, giant cheesesteak statue serving as a local restaurant mascot. Once brought to life with an experimental chemical spray, it provides physical muscle for a miniature army lacking brute strength.