Wyatt is a short eighth grader from Miami. He is used to strange situations at home but generally tries to stay out of trouble, fearing his mother's strict punishments. He harbors a massive crush on his popular classmate Suzana and acts as a reluctant but loyal companion to his impulsive best friend.

Matt is an impulsive eighth grader with a strong belief in conspiracy theories. His quick assumptions and reckless actions, such as stealing an electronic device from a stranger's bag, frequently propel him and his friends into dangerous situations. He serves as the primary instigator of the boys' chaotic adventures.

Suzana is an eighth grader characterized by her popularity, intelligence, and tall stature. She possesses martial arts training and a take-charge attitude. Rather than dismissing Matt and Wyatt's strange situation, she actively inserts herself into their plans and demonstrates a clear desire for adventure.

Woltar is a large, bald man from the nation of Gadakistan who sports snake tattoos on his arms. He and his traveling companion immediately draw the suspicion of the middle schoolers due to their intense behavior and mysterious luggage.

Lemi is a short man from Gadakistan with long, stringy hair. He travels with a strange electronic device and a traditional dragon sculpture. His secretive actions trigger the paranoid suspicions of the eighth graders sitting nearby.

Cameron is an eighth-grade class clown known for his crude humor and ability to fart on command. Although Wyatt initially views him as an annoyance, Cameron's willingness to participate in the group's secret activities fully integrates him into their circle of friends.

Victor is a sensible and highly intelligent eighth grader. He acts as the grounded researcher of the group, utilizing his internet skills to gather information on foreign countries and military technology. He provides a cautious counterweight to his impulsive classmates.

Mr. Barto is a forgetful civics teacher leading the Culver Middle School trip. He operates with a strict set of rules, frequently warning students that any misbehavior will result in them being sent home immediately.

Gorban Brevalov is the newly self-appointed president of Gadakistan, a nation that recently underwent a war of independence. He has publicly declared himself an ally of the United States and is scheduled to visit the White House during the students' class trip.

Miss Rector is a teacher and chaperone for the eighth-grade class trip. She works alongside Mr. Barto to corral the students and ensure they adhere to the strict behavioral guidelines required for the journey.