Grace is a 16-year-old high school student working through the emotional aftermath of placing her baby up for adoption. As the only child of her adoptive parents, she feels socially isolated and judged by her peers upon returning to school. Her intense need to connect with someone who shares her DNA drives her to seek out her biological mother and her two newly discovered biological siblings.

Maya is a 15-year-old girl struggling to find a sense of belonging within her own home. Adopted into a wealthy family that later had a biological daughter, Maya stands out as the only brunette among redheads. She guards the secret of her mother's severe alcoholism and uses sharp humor to keep others at a distance.

Joaquin is a 17-year-old boy who has spent his entire life in the foster care system without ever being permanently adopted. He carries immense guilt and trauma from a failed adoption placement when he was twelve years old. Convinced that he is destined to hurt anyone who gets close to him, he actively self-sabotages his relationships.

Rafael is a new student at Grace's high school who works at a local cooking-supply store called Whisked Away. Because he is new to the area, he knows nothing about the rumors surrounding Grace's pregnancy. He is gentle, humorous, and offers a platonic friendship that requires nothing from her.

Lauren is Maya's 14-year-old sister and the biological daughter of their parents. Born just months after Maya was adopted, Lauren fits perfectly into the family's physical mold with her red hair and freckles. She attempts to maintain a close bond with her older sister as the tension in their household escalates.

Maya's adoptive mother lives in a beautifully decorated home but battles a severe addiction to alcohol. She attempts to hide empty wine bottles around the house, creating an environment of secrecy and anxiety for her daughters.

Maya's adoptive father is a wealthy man who values presenting a flawless image to the outside world. He struggles to cope with his wife's drinking problem and often leaves his daughters to manage the fallout of the household's dysfunction.

Mark is Joaquin's current foster father. He actively tries to integrate Joaquin into his life by teaching him how to drive and sharing everyday activities like baseball games. He offers patience and stability to a teenager accustomed to neither.

Linda is Joaquin's foster mother. Alongside her husband, she provides the most stable environment Joaquin has ever experienced. She is understanding of his hesitation but consistently communicates her love and desire to officially adopt him.

Claire is Maya's girlfriend. Coming from a functional and communicative family, Claire struggles to understand why Maya refuses to open up about her home life. She serves as an emotional anchor for Maya, offering comfort without demanding immediate explanations.

Grace's adoptive mother is highly involved in her daughter's life and recovery following her pregnancy. She worries constantly about Grace's social isolation and pushes her to return to typical teenage activities, occasionally causing friction between them.

Grace's adoptive father focuses on practical solutions to his family's struggles. When tensions rise in the household regarding Grace's behavior and socialization, he suggests professional counseling to help them communicate.

Melissa Taylor is the biological mother of Grace, Maya, and Joaquin. She gave up all three of her children to adoption and foster care systems when they were very young. She exists primarily as an elusive figure from the past whom the siblings are determined to locate.

Max is a popular high school athlete and Grace's ex-boyfriend. After learning about the pregnancy, he and his family immediately push all responsibility onto Grace. He completely avoids her when she returns to school and does nothing to stop his friends from bullying her.

Adam is a high school student and a close friend of Max. He actively torments Grace when she returns to school, using cruel tactics to mock her pregnancy and the adoption of her child.

Birdie is Joaquin's ex-girlfriend. She comes from a stable home with extensive family history and traditions. She deeply cares for Joaquin and is left heartbroken and confused when he abruptly ends their relationship out of fear.

Ana is a therapist who works with Joaquin to help him navigate his transition out of the foster care system. She conducts their sessions in a diner to make him more comfortable and actively challenges his habit of pushing loved ones away.

Grace's biological daughter, whose birth permanently alters her teenage mother's life. Grace privately refers to her as "Peach" based on her size during the second trimester, while her adoptive parents formally name her Milly.

Catalina is the adoptive mother of Grace's baby. She is deeply grateful for the child and actively offers to keep the adoption open so Grace can remain a part of the little girl's life.

Daniel is the adoptive father of Grace's baby. Alongside his wife, he writes letters to Grace to assure her that the child will grow up knowing that her biological mother loved her.

Janie is Grace's former best friend. After Grace's pregnancy forces her out of their normal social circles, Janie struggles to interact with her, treating her more like an outcast than a friend upon her return to school.