On my block

In the fictional rough inner-city Los Angeles neighborhood of Freeridge, four teens find their lifelong friendship tested as they begin high school. The On My Block storyline follows four bright, street-savvy teens—Monse Finnie, Ruby Martinez, Jamal Turner, and Cesar Diaz—as they navigate the trials of high school. Their lifelong bond is tested when Cesar gets pulled into the local Santos gang by his older brother, Oscar "Spooky" Diaz, prompting Jamal to lead a search for a legendary hidden RollerWorld money stash to buy Cesar out

Main characters: Monsé Finnie, a headstrong Afro-Latina 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.

Ruben "Ruby" Martinez Jr., a smart-aleck math whiz of Mexican descent often serving as the group's conscience

Jamal Turner, the nerd of the group, who is African-American., he is drawn into finding a hidden treasure scheme surrounding RollerWorld

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.

Jasmine Flores, a classmate of the group, who has a romantic obsession with Ruby.

Oscar "Spooky" Diaz, Cesar's older brother and a high-level member of the Santos gang.

Marisol Martinez 'Abuelita', Ruby's grandmother.

Olivia, 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.

Side characters: Latrelle, a former classmate of the group and a member of the Prophet$, a longtime rival gang to the Santos

Chivo, a gardener and former Santos gang member caught up in Jamal's hidden treasure scheme

Geny Martinez, Ruby's mother

Ruben Martinez, Ruby's father

Mario Martinez, Ruby's older brother

Luisa Martinez, Ruby's little sister

Monty Finnie, Monsé's father. A truck driver, mostly on the road away from Monsé to work

Selena "Julia" Whitman, Monsé's biological mother who left at a young age, and reconnected with monsé

Dwayne Turner, Jamal's father. Former Freeridge High School football player and owner of Dwayne's Joint, a local restaurant

Mrs. Turner, Jamal's mother

Coach Ron, the Freeridge High School football coach and Sex Ed teacher

Rosé Westbrook, a former Soul Train dancer caught up in Jamal's hidden treasure scheme. Former best friend of Stacy, aka Cuchillos, leader of the Santos.

Amber, Mario's girlfriend

Cuchillos, the leader of the Santos before her death

Ainsley Riches

Cuete, a 19th Street gang member

Kendra, Jamal's love interest

Ray, 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.

Vero, Cesar's girlfriend

• The Friendship Group: The four streetwise teens have been inseparable since childhood. As they enter high school, they face the pressure of growing up while trying to keep their bond alive. • The Gang Conflict: Cesar gets pulled into the local street gang, The Santos, through his older brother, Oscar ("Spooky"), threatening to tear the group apart as they try to save him. • The RollerWorld Mystery: Jamal becomes obsessed with finding a rumored hidden stash of $200,000 from an 1980s roller-rink robbery (RollerWorld), dragging the group into dangerous comedic adventures. • Tone & Themes: The show mixes gritty neighborhood realities—like gang violence, poverty, and grief—with quirky teenage comedy, romance, and vibrant character dynamics.