Hope is a resilient sixteen-year-old waitress who frequently moves from town to town. Originally named Tulip by her mother, she changed her name to Hope, which reflects her enduring optimism. Skilled at waitressing, she uses her humor and strong work ethic to manage the emotional toll of constantly starting over. She carefully maintains scrapbooks documenting her life in the hope of one day sharing them with the biological father she has never met.

Addie is Hope's adoptive mother and biological aunt, stepping in to raise Hope when her sister Deena left. She is a fiercely dedicated, no-nonsense diner cook who demands perfection in her kitchen but provides unwavering love and stability for Hope. Her decision to move them to Mulhoney follows a devastating financial betrayal by her former business partner.

G.T. is the cheerful, Quaker-raised owner of the Welcome Stairways diner in Mulhoney. Despite battling leukemia, he maintains a radiant positivity and a deep commitment to his community. Driven by his strong moral compass and a desire to make his remaining time count, he decides to run for mayor against the corrupt incumbent, Eli Millstone.

Eddie, who goes almost exclusively by his last name, is the tall, ruggedly handsome line cook at the diner. Having delayed college to care for his sick mother and twin sisters, he is deeply loyal to G.T., who gave him a job when his family needed it most. He is a passionate, occasionally hot-headed supporter of G.T.'s mayoral campaign.

Eli Millstone is the corrupt incumbent mayor of Mulhoney who has held office for eight years unchallenged. He relies on underhanded tactics, physical intimidation, and the financial backing of the powerful Real Fresh Dairy corporation to maintain his grip on the town. His slick, polished exterior hides a ruthless willingness to crush political opposition.

Deena is Hope's biological mother and Addie's sister. A career waitress who gave up her daughter prematurely because she felt unable to handle motherhood, she remains emotionally and physically distant. Her primary connection to Hope exists through sparse letters and shared waitressing tips.

Gleason Beal is Addie's former business partner at the Blue Box diner in Brooklyn. His theft of the diner's money forces Addie and Hope to uproot their lives once again and move to Wisconsin in search of a fresh start.

Harrison is Hope's sensitive best friend from her time living in Brooklyn. Though he stays behind when Hope moves to Wisconsin, they keep in touch through letters, and his memory provides her with emotional comfort when she feels homesick.

Lou Ellen is an experienced waitress at Welcome Stairways who initially views Hope with skepticism. She is a fiercely dedicated but exhausted mother dealing with the severe stress of raising a toddler who has complex developmental delays.

Anastasia is Lou Ellen's frail, fourteen-month-old daughter. She experiences developmental delays and struggles to eat properly, causing great anxiety for her mother until the diner staff steps in to help create a makeshift nursery.

Adam is a driven local teenager and the head of the Students for Political Freedom Coalition. He passionately organizes the youth of Mulhoney to rally behind G.T.'s mayoral campaign, proving himself to be a highly capable and enthusiastic political organizer.

Jillian is a teenager at Mulhoney High School who works diligently on G.T.'s campaign. She is technologically skilled and uses her talents to design an impressive website for the mayoral run. She quickly befriends Hope and provides insight into local town dynamics.

Deputy Babcock is a police officer in Mulhoney who stands out as a rare figure of integrity within a largely corrupt local law enforcement department. She responds quickly when Hope is assaulted and conducts honest investigations into crimes against G.T.'s supporters.

Sheriff Greebs is the head of local law enforcement in Mulhoney. He actively turns a blind eye to the intimidation tactics used against G.T.'s supporters, aligning himself directly with Mayor Millstone's corrupt administration and Real Fresh Dairy.

Sid Vole is Adam's uncle and a professional political "spin doctor." He arrives in Mulhoney to offer his expertise to G.T.'s campaign, though his tactical suggestions—such as exploiting G.T.'s illness for sympathy—often clash with G.T.'s strict moral principles.

Flo is the capable floor manager at Welcome Stairways diner. She helps orchestrate the chaotic daily operations, directs the waitstaff during busy shifts, and refuses to be bullied by local men demanding she put up Millstone campaign signs.

Mr. Woldenburg is a gruff, cynical regular customer at the diner who consistently orders grilled cheese on white bread. He claims to have absolutely no faith in politicians and initially refuses Hope's attempts to engage him in the mayoral race.

Pastor Hall is a local minister in Mulhoney. Though initially concerned about G.T.'s health under the immense strain of a political campaign, he becomes a steadfast supporter and spiritual peer as the race intensifies.

Yuri is a Russian immigrant who works as a busboy and assistant at the Welcome Stairways diner. He quietly assists the waitstaff during overwhelming rushes and bears the brunt of local bullies' jokes.