Bailey is a practical, book-loving teenager who moves to Omaha, Nebraska, to live with her mother following her parents' divorce. She relies on structure and rules to maintain control over her changing life, making her naturally averse to unpredictable situations. Initially wearing glasses and braces, she grows into a deeply compassionate person who struggles to assert her own boundaries, often internalizing her discomfort to keep peace in her family.

Charlie is a witty and sarcastic high school senior moving from Alaska to Omaha. His parents' divorce has left him highly cynical about romance, convinced that all relationships are destined to fail and that platonic friendships between boys and girls are impossible. He masks his underlying anxiety and fear of emotional vulnerability behind a laidback, rule-breaking exterior and a habit of inventing silly games.

Nekesa is Bailey's observant and emotionally wise best friend. She provides gentle but direct advice when Bailey struggles to see reality clearly. Working alongside Bailey at the massive entertainment hotel Planet Funnn, she maintains a cheerful disposition but soon finds her own relationship boundaries tested by workplace banter.

Scott is Emily's new boyfriend who begins spending significant time at their apartment. He is generally well-meaning and attempts to bond with Bailey by organizing family trips. However, his presence threatens Bailey's fragile post-divorce routine, and his occasional attempts to discipline her create immediate friction in the household.

Emily is Bailey's mother who lives in Omaha, Nebraska. Following her divorce, she has developed a very close, almost friendship-like bond with her daughter. She is optimistic about her new romantic relationship and eager to blend her life with her new partner, sometimes failing to notice Bailey's quiet discomfort.

Theo is a confident, somewhat pompous employee at Planet Funnn. He enjoys flirtatious workplace banter and instigates a cynical wager regarding his ability to charm his coworkers.

Zack is Bailey's ex-boyfriend from Omaha. Their relationship ended over a minor argument, and he quickly moved on to date other girls, leaving Bailey without closure and struggling to move forward.

Aaron is Nekesa's current boyfriend. He represents the kind of stable, loyal teenage relationship that Bailey believes in and Charlie dismisses as impossible.

Becca is a petite blonde girl who dates Charlie for over a year. She expects a certain level of devotion from her partners and continues to text Charlie occasionally even after their relationship ends.

Bailey's father resides in Alaska and struggles to maintain a consistent connection with his daughter after the divorce. He becomes increasingly distracted by his career and personal life, relying on Bailey to initiate their communication.

Charlie's mother lives in Nebraska with her new boyfriend. She worries about Charlie's physical anxiety symptoms but remains largely unaware of his deeper emotional struggles and resentment toward her changing household.

Dana is one of Bailey's gorgeous, single friends. She agrees to go on a bowling double date, where she unexpectedly hits it off with someone else.

Eli is one of Charlie's friends who attends parties and social events with their main friend group. He is friendly and eager to pursue girls he finds attractive.

Puffball is a stray kitten rescued from a tree during a hiking trip. The small cat becomes a shared responsibility that requires temporary housing and careful coordination.

Clio is an enthusiastic partygoer who participates in trivia games and ends up singing karaoke when her team misses a question.

Grace is a girl Charlie spends the summer dating in Alaska. She desires a long-distance relationship, but Charlie decides to ghost her because he refuses to believe long-distance romance can work.

Adam is one of Charlie's friends who hangs out at local parties and gatherings.

Evan is part of Charlie's close circle of friends. He participates in group events and parties.

Kyle is a local boy who begins dating Becca after her relationship with Charlie ends. His sudden appearance at social events sometimes kills the mood for others.

Kelsie is the girl Zack begins dating shortly after his breakup with Bailey. She goes on the exact same coffee dates Zack previously took Bailey on.

Kristy is a popular and reportedly rude girl from Bailey's school. Bailey discovers she is Scott's niece, bringing unwanted high school drama closer to home.

Lucy is Scott's daughter. Like Bailey, she harbors quiet reservations about her changing family dynamics and the impending reality of a blended household.

Alyssa is the woman dating Bailey's father. Her relationship with him contributes to his distraction and distance from Bailey.

Mr. Cleveland is an instructor at Planet Funnn. He evaluates the new hires and places the more responsible teenagers into the Protostars administrative group.