A thirteen-year-old girl in the foster care system who is recruited by the US marshals for Project Family. With a history of instability, an imprisoned father, and an absentee mother, she deals with stress through a compulsive urge to pickpocket. She is assigned to pose as the daughter of a family hiding from the mafia, seeking a chance at a permanent home.

Formerly an attorney for a powerful criminal enterprise, she testifies against her own relatives and is placed in witness protection with her husband and son. She dyes her hair blond to hide her identity but retains an air of grace. She attempts to adjust to her new suburban life while bearing the guilt of placing her family in danger.

The supportive husband of Harriet who relocates his life after his wife testifies against the mafia. He does not come from a criminal background himself but remains patient and dedicated to keeping his family safe. He embraces his new suburban identity in Durham, working to establish a sense of normalcy.

A twelve-year-old boy deeply resentful of being uprooted from his past life and thrust into witness protection. He struggles with the strict rules imposed by the US marshals and chafes at the sudden addition of an older sister to his family. He often lets his anger and frustration get the better of him.

A cold-blooded hitman for the Cercatore crime family, known by the nickname "the BARD" because he avoids being prosecuted beyond a reasonable doubt. He is Harriet's estranged brother and is determined to track down and eliminate her family for testifying against their criminal enterprise.

A stern, humorless US marshal assigned to handle the Trevor family's placement in WITSEC's new Project Family. She runs a tight ship, enforcing strict rules about maintaining average grades and avoiding social media. She expects perfection and complete compliance from her charges.

A physically imposing but friendly US marshal who helps recruit Charlotte into the witness protection program. He recognizes her street smarts and grit, believing she has what it takes to survive the assignment. He provides a more supportive presence compared to his strict partner.

A shy seventh-grade student at Loblolly Middle School who shrinks away from the harsh attention of her peers. Behind her quiet, self-effacing exterior, she is a highly skilled computer whiz and a fierce online gamer known as BritneySpeargun.

An effusive, bubbly middle school student deeply involved in Loblolly's extracurricular activities. She campaigns actively for student council president and makes it her mission to welcome new students, operating at an exhausting pace to maintain her overachieving persona.

The resident popular girl at Loblolly Middle School, running a blog centered entirely around herself. She leads a posse of followers and actively campaigns for student council president, using underhanded tactics and intimidation to maintain her social status.

An athletic, handsome seventh-grader who plays on the school basketball team. He observes Charlotte closely, taking an interest in her athletic performance, and considers himself helpful by offering to coach her.

A career criminal who has been serving time in prison since his daughter was six years old. Despite being released when she was eleven, he never sought her out, leaving her stranded in the foster care system.

A talkative, nosy neighbor who lives on the Trevors' street. She is heavily involved in the neighborhood association but remains completely unaware of her own daughter's impressive computer and gaming skills.