Bobbi, the rebellious daughter of a preacher, initially seems uninterested in Mibs but becomes an ally. She helps Mibs understand the complexities of those around her, revealing a more sensitive side than she lets on.

Lester is a kind but insecure bus driver who harbors Mibs and her friends on their journey. His character provides comic relief as he deals with the influence of his tattooed reminders of past relationships.

Lill is a waitress who joins the group on their bus adventure, acting as a nurturing figure. Her ability to connect with people helps guide and support Mibs and her companions.

Will is a kind-hearted boy raised by the Meeks, who joins Mibs on her quest. He serves as a supportive friend to Mibs, showing compassion and interest in her abilities.

Fish is Mibs's older brother who has the power to create storms. He struggles to control his power and is fiercely protective of his family.

Rhonda and Carlene are the names on Lester's arm tattoos, representing voices of self-doubt and past relationships. Their constant chatter highlights Lester's internal struggles.

Carlene, an antagonist, is Lester’s ex-girlfriend, who challenges Mibs's journey by trying to sabotage it.

Samson is Mibs's younger brother who has a calming presence, believed to be a nascent version of a savvy. He quietly supports and influences those around him.

Momma is Mibs's mother, known for doing everything perfectly and supporting her children in their unique struggles.

Poppa is Mibs's father, whose condition prompts Mibs’s journey. His presence looms large in the narrative, influencing Mibs’s actions and resolve.

Rocket is Mibs's oldest brother who can control electrical power but struggles with emotion management. His challenge serves as a warning example for his siblings.

Grandpa Bomba can move and shape the earth. He provides wise counsel to Mibs, helping her understand the nature of her savvy.

Bill is a state trooper and a late-appearing character who aids in resolving the legal issues faced by the stowaways on their trip.

Gypsy, the youngest Beaumont, is characterized by her love for soft, comforting things. Though she plays a minor role in this story, she is expected to have her own adventure later.

Miss Rosemary, the preacher’s wife, has a no-nonsense attitude and sometimes cares for the Beaumont kids. She plans a public birthday party for Mibs.

Pastor Meeks, a minor character, plays a part in catalyzing the plot when he rejects a delivery, sparking the bus adventure with Mibs and her friends.