Cameron is a thirteen-year-old eighth-grader whose primary interest is playing video games. He carefully arranges his life to do the absolute minimum amount of work required so he can dedicate his time to training for a gaming competition. When his negligence nearly causes a house fire, his parents issue an ultimatum that forces him to pretend to join a school club, leading him to invent a fake organization to protect his free time.

Daphne is an eighth-grade student who feels disillusioned by the consumerism and self-centered attitudes in her town. She cares deeply about an elderly, displaced beaver named Elvis and hopes to find a way to help him. Her high expectations lead her to track down Cameron when she believes his club can make a real difference in the community.

Pavel is an intelligent eighth-grader and one of Cameron's best friends. He excels academically and possesses significant computer skills, having previously hacked into the school's website in the sixth grade. Pavel uses his technological abilities to help Cameron create a realistic-looking webpage for the fake club.

Chuck is part of Cameron's core group of gaming friends. Though he shares Cameron's interest in video games and the upcoming competition, he possesses a more open mind toward other activities. He frequently panics during tense gaming moments but remains a valued member of their group.

Mr. Fanshaw is a guidance counselor at Sycamore Middle School who constantly worries about the town's declining economy. He is highly optimistic and sees only the best in his students, causing him to completely misinterpret Cameron's intentions regarding the new club. He takes it upon himself to become the faculty advisor for the organization.

Melody is Cameron's younger sister, currently in the sixth grade. She is deeply frustrated by her brother's lazy lifestyle and the way he monopolizes the family's gaming console. She pays close attention to the details of Cameron's fake club scheme and hopes their parents will soon recognize his deception.

Jennifer is a high school senior, head cheerleader, and homecoming queen in Sycamore. She leads a high school community service organization called Friends of Fuzzy. She is highly competitive and determined to pad her resume with charity work for her Harvard application, viewing any other volunteer groups as direct threats to her success.

Known to most of his peers as "String," Freeland is a star player on the middle school football team. Because he focuses entirely on sports to the detriment of his classes, he is placed on academic probation. He joins Cameron's club solely as a way to earn extra credit and return to the football field.

Xavier is an older student at the middle school who has been held back following time in juvenile detention. His broad shoulders and tough reputation make many of the eighth-graders fear him. He becomes involved with the volunteer group because he is required to complete court-ordered community service hours.

Jordan is an eighth-grade student running a tense campaign for student body president. He focuses heavily on his public image and beating his opponent. He views the new volunteer club primarily as an opportunity to boost his reputation and secure more votes.

Felicia is an eighth-grader who serves as Jordan Toleffsen's campaign manager and close friend. She strategizes ways to improve Jordan's poll numbers and suggests he associate himself with the newly formed club to look better to voters.

Kelly is an eighth-grade student running against Jordan Toleffsen for student body president. She participates heavily in school activities, pushing her opponents to find new ways to stand out in the election.

Jordana is a seventh-grade student who enters the middle school presidential race. Her opponents suspect her entry is a strategic move designed to divide the student vote.

Tony is Jennifer Del Rio's boyfriend and frequent driver. He supports Jennifer in her aggressive tactics to secure volunteer opportunities for her high school club, often serving as her backup during confrontations.

Audra is a reporter for the local Sycamore newspaper. She writes articles about community events and becomes highly interested in the activities of the middle school's new volunteer organization, keeping a close eye on their projects.

Dr. LaPierre is the principal of the middle school. He monitors the activities of the student organizations and holds the authority to intervene when club conflicts begin disrupting the school environment.

Katrina is Melody Boxer's best friend. She frequently hosts Melody at her house so they can play video games together, and she takes a genuine interest in the school's new volunteer organization.

Elvis is an elderly beaver who was left behind by his colony when a new mall destroyed their habitat. He wanders around the town causing minor property damage, making him a nuisance to many adults but a priority for local animal lovers.

Emma is Chuck Kinsey's older sister and a member of the high school community service club, Friends of Fuzzy. She finds herself caught between her high school loyalties and her younger brother's middle school group.