Main •
Sierra Capri as Monsé Finnie, tomboy, who serves as the leader of her friend group. Raised by her single father, she is in love with one of her best friends, Cesar. •
Jason Genao as Ruben "Ruby" Martinez Jr., who is
African-American. In season 1, he is drawn into finding a hidden treasure scheme surrounding RollerWorld. •
Diego Tinoco as Cesar Diaz, an intelligent
Latino teen forced into gang life once his brother is released from prison, putting a strain on a blossoming relationship with Monsé. •
Jessica Marie Garcia as Jasmine Flores (seasons 2–4; recurring season 1), Cesar's older brother and a high-level member of the Santos gang. •
Peggy Blow as Marisol Martinez 'Abuelita' (season 4; recurring season 1–3), Ruby's grandmother.
Recurring •
Ronni Hawk as Olivia (season 1), a friend of Ruby's family who moves in with them after her parents are deported, and Ruby's love interest. She is shot by Latrelle and dies in the season 1 finale. •
Jahking Guillory as Latrelle (season 1–2; guest season 4), a former classmate of the group and a member of the Prophet$, a longtime rival gang to the Santos •
Emilio Rivera as Chivo (season 1–2, 4), (season 3, voice only), a gardener and former Santos gang member caught up in Jamal's hidden treasure scheme •
Paula Garcés as Geny Martinez, Ruby's mother • Eric Neil Gutierrez as Ruben Martinez, Ruby's father •
Danny Ramirez as Mario Martinez (season 1–2), Ruby's older brother • Kylie Samaniego as Luisa Martinez (season 1–2), Ruby's little sister • Julian Lerma as Luis Martinez (season 1–2), Ruby's little brother •
Reggie Austin as Monty Finnie, Monsé's father. A truck driver, mostly on the road away from Monsé to work •
Lisa Marcos as Selena "Julia" Whitman (season 1–2), Monsé's biological mother who left at a young age, and reconnected with in season 2 •
Eme Ikwuakor as Dwayne Turner, Jamal's father. Former Freeridge High School football player and owner of Dwayne's Joint, a local restaurant • Raushanah Simmons as Mrs. Turner, Jamal's mother • Rob Murat as Coach Ron (season 1–2, 4), the Freeridge High School football coach and Sex Ed teacher •
Angela E. Gibbs as Rosé Westbrook (season 1, 3), a former Soul Train dancer caught up in Jamal's hidden treasure scheme. Former best friend of Stacy, aka Cuchillos, leader of the Santos. •
Shoshana Bush as Amber (season 2; guest season 4), Mario's girlfriend. • Ada Luz Pla as Cuchillos (season 3), the leader of the Santos before her death •
Mallory James Mahoney as Ainsley Riches (season 3) • Gilberto Ortiz as Cuete (season 3–4), a 19th Street gang member • Troy Leigh-Anne Johnson as Kendra (season 3; guest season 4), Jamal's love interest • Ian Casselberry as Ray (season 3–4), Cesar and Spooky's father. Former Santos gang member before going to prison when Cesar and Spooky were kids. Worked at Dwayne's Joint after his release. •
Nikki Rodriguez as Vero (season 4), Cesar's girlfriend • Andrea Cortés as Isabel (season 4), Oscar's wife ==Episodes==