Micah is a self-employed IT technician in his early forties who also works as a maintenance man for his basement apartment complex. He thrives on strict daily routines, ranging from scheduled house chores to immaculate driving habits watched over by an imaginary Traffic God. He prefers to keep people at arm's length. He avoids messy emotional entanglements and prefers the predictable nature of his isolated life.

Cass is a fourth-grade teacher in her late thirties who has been dating Micah for three years. She is a practical, nurturing woman who keeps a cozy, slightly cluttered apartment filled with houseplants and matching linens. Her desire for connection and willingness to care for others differs greatly from Micah's solitary tendencies.

Brink is an 18-year-old college freshman from a privileged background who mysteriously leaves school. Well-dressed but evasive about his true motivations, he tracks Micah down under the belief that the IT technician might be his biological father. He feels alienated by his own family's high expectations and seeks out a life entirely different from his own.

Lorna is Micah's former girlfriend from college who now works as a lawyer in Washington D.C. During their youth, she belonged to a fundamentalist church and strictly adhered to its principles. She has since changed significantly into a successful professional. She remains a fiercely protective and anxious mother who worries deeply about her eldest son's disappearance.

Roger is a lawyer, Lorna's husband, and Brink's stepfather. He maintains a stern, practical approach to parenting that often clashes with Lorna's anxious fawning. He holds high standards for his family, resulting in a tense dynamic with his stepson.

Ada is the oldest of Micah's four sisters. She presides over a chaotic, cluttered household that regularly hosts large, boisterous family gatherings. She acts as a central figure for the extended family, frequently checking in on Micah and attempting to integrate his solitary life into their loud dynamic.

Joey is Ada's youngest son and Micah's nephew. Unemployed and in his twenties, he still lives at home but recently surprised his relatives by announcing his engagement. He relies heavily on his mother's support as he prepares to transition into married life.

Lily is Joey's fiancée, a grocery store employee who quickly integrates into his chaotic family dynamic. She frequently dreams about having babies, which the family interprets as her readiness to move into the next stage of adulthood.

Liz is one of Micah's older sisters, a twin to Norma, who works as a waitress. She shares the family's broad tolerance for household chaos but suffers from extreme anxiety regarding physical danger, reacting dramatically whenever her teenage son mentions his reckless behavior.

Norma is one of Micah's older sisters, twin to Liz, who also makes a living as a waitress. She contributes to the collective family voice that playfully criticizes Micah's finicky habits while expressing deep affection for his girlfriend.

Suze is the youngest of Micah's four older sisters and the closest to him in age. She actively participates in the family's teasing of Micah's cleanliness but also offers direct, proactive support when she learns of his personal troubles.

Yolanda is a woman in her fifties who lives in Micah's apartment complex. She frequently updates Micah on her active online dating life, maintaining a resilient and optimistic outlook on romance despite facing continuous setbacks.

Luella is a resident in Micah's building who suffers from an incurable illness that severely limits her mobility. Despite her physical decline, she speaks brazenly about her anger regarding her loss of independence and her frustrations with her husband's sleeping habits.

Donnie is Luella's husband. He attempts to quietly manage his wife's declining health crises while enduring her irritable frustrations regarding his daily habits.

Deuce is Micah's former college colleague. He and Micah started a software company together shortly after leaving school, but Deuce's privileged background and entitled attitude eventually caused Micah to abandon the partnership.

Zara is a dancer and one of Micah's former girlfriends. Their relationship ended poorly when Micah inadvertently discovered her infidelity through a phone call, leading him to view the exhausting relationship as a cautionary tale.

Adele is Micah's former girlfriend who ultimately left him to dedicate her life to conservation work. Because Micah held back emotionally during their time together, he felt relieved rather than heartbroken when she departed.

Rosalie is a friendly young woman who has recently inherited her grandmother's house and belongings. She persistently hires Micah to help her access locked files and attempts to establish a friendly, ongoing connection with him.

Kegger is Liz's husband. He casually attempts to bond with Micah by asking for tech advice, initially using nicknames before respectfully adjusting to Micah's preferred name.

Carl is Liz's teenage son. He frequently engages in reckless behavior with his friends, resulting in injuries that deeply stress his anxious mother.

Mrs. Prescott is one of Micah's regular, older tech-support clients. She frequently struggles with basic technology and insists on paying Micah even for minor, simple fixes.

Henry is a local carpenter who specializes in preventing rodent entry. Hired to do maintenance on Yolanda's apartment, he politely ignores her flirtatious advances while focusing entirely on his work.

Amy is Norma's daughter and Micah's niece. Like the rest of the extended family, she holds great affection for Cass, having hoped the teacher would help with her college applications.

Dave is Suze's husband. He integrates seamlessly into the loud family dynamic and participates in the good-natured teasing regarding his brother-in-law's obsessive cleaning habits.

Raymond is Lily's older brother. He serves as a point of contrast during a family conversation, as he is close to Micah in age but lives a messy lifestyle, relying entirely on his mother to do his laundry.