Chloe is a 24-year-old freelance graphic designer living in a three-bedroom apartment left by her former college roommates. Adopted at age seven after experiencing severe neglect, she has a habit of shrinking herself to meet other people's expectations. When her estranged birth mother gives birth to a premature baby, Chloe steps forward to take custody. She agrees to join a cohabitation program with a stranger to satisfy state financial and housing requirements.

Warren is a 23-year-old auto shop employee desperately trying to secure custody of his deaf teenage brother. Following his mother's fatal overdose and his father's abandonment, Warren developed strict emotional boundaries and persistent anger issues. He joins the Team Up program because his current one-bedroom apartment is too small to satisfy the state's requirements for a teenager. He initially judges Chloe as a spoiled rich girl based on her college degree and large apartment.

Luke is Warren's fifteen-year-old younger brother. He is deaf, communicates entirely through American Sign Language, and refuses to read lips. Despite the instability of the foster care system, he maintains a fun, exuberant personality and enjoys spending time with his friends. He relies on Warren for stability but forms a quick, easy bond with Chloe over shared meals.

Willow is Chloe's newborn half-sister. She is born prematurely and suffers from complications related to fetal alcohol syndrome, including high blood pressure and an arterial hole. Her vulnerable state inspires Chloe to enter the Team Up program, bringing the entire household together under one roof.

Emily is Chloe's former college roommate who works in fashion. As a transgender woman, she understands the experience of holding back personal truths, making her an empathetic and safe listener when Chloe finally opens up about her traumatic childhood.

Lane is Chloe's other former college roommate. She lived with Chloe and Emily for several years and remains an essential part of Chloe's supportive chosen circle, eagerly welcoming the new additions to Chloe's life.

Odette is a social worker who has managed Chloe's birth mother's case for years. She approaches her difficult job with a calm, non-judgmental demeanor, helping Chloe establish initial care protocols for Willow without applying unnecessary pressure.

Calvin is a young nurse working in the hospital's intensive care unit. He cares for Willow during her first weeks of life and makes his romantic interest in Chloe clear, eventually coming over for a movie date that sparks immediate tension with Warren.

Chloe's estranged mother is a woman struggling with severe alcohol addiction. She unexpectedly gives birth to Willow and surrenders her parental rights, recognizing she cannot provide a safe environment for the infant while occasionally drifting between apologetic and belittling behavior.

The biological father of Warren and Luke abandoned his sons years ago, leaving Warren to fend for himself and forcing Luke into the foster care system. He occasionally reappears, usually motivated by self-interest and the potential to receive state financial assistance.

The couple who adopted Chloe when she was seven years old. While they provided financial stability and met her basic needs growing up, they remain highly critical, passive-aggressive, and overly focused on outward appearances and financial status.

Rachel is a social worker handling the logistical side of Chloe's guardianship application. Recognizing that Chloe has the space but lacks the income, she proposes the newly implemented Team Up plan, pairing Chloe and Warren together to meet the state's stringent requirements.

The owner of the auto shop where Warren works. He gave Warren the nickname "War" and remains a supportive professional figure who respects his employee's dedication to family.