Griffin's best friend, known for his diminutive stature and cautious nature, accompanied by his service ferret, "Ferret Face."

A shy computer wizard who utilizes her hacking skills to aid Griffin’s plans, preferring to stay under the radar with her face hidden behind her hair.

The emotional heart of Griffin's posse, with a unique talent for communicating with animals, often acting as the group's nurturer.

The group's tall, athletic tomboy known for her physical prowess and candid demeanor, often relied upon for tasks requiring strength.

An aspiring actor who sees each caper as performance practice, confident in his ability to adopt any necessary persona.

A strong and unexpectedly tender-hearted new member of Griffin’s posse, initially from the Jail For Kids and determined to be included in Griffin’s plans.

The new principal of Cedarville Middle School, critical of Griffin and referred to by Griffin’s friends as “Dr. Evil.”

A student with motivations to undermine Griffin and a desire to profit from the stolen Super Bowl ring.

A descendant of the ring’s original owner who believes the ring rightfully belongs to him rather than the school.

A local reporter with a grudge against Griffin, suspiciously involved due to her history of reporting on his exploits.

The school custodian and a longtime fan of the Baltimore Colts, holding a different perspective on the ring’s current ownership.

The author who portrays adults in the narrative, typically as obstructive to Griffin and his plans.

Parents with high expectations of Griffin, frequently disappointed by the repercussions of his actions.

An authority figure who remains suspicious of Griffin, holding a personal grudge due to past interactions.

A legal authority familiar with Griffin, known for imposing increasing restrictions on him.

Savannah’s large Doberman, known for his ability to obey Savannah’s instructions, despite his troublesome behavior.

The animal inadvertently causing Griffin’s predicament, known for swapping Griffin’s retainer with the missing Super Bowl ring.