A young and ambitious gang leader of the Black Kings who provides Venkatesh with access to the inner workings of gang life. He sees himself as a positive force in the community.

A powerful and respected building president in the Robert Taylor Homes who provides Venkatesh with insights into the tenants' lives. She is known for her strong influence and willingness to engage in corruption.

J.T.'s mother who forms a bond with Venkatesh, offering him a sense of community and comfort. Her apartment serves as a refuge for him, and she shares perspectives on raising families in the projects.

J.T.'s cousin and a prostitute who works in the building, known for being straightforward about her occupation. She educates Venkatesh about prostitution and acts as a confidante.

An older resident and leader figure among the male hustlers in J.T.'s building. He often challenges Venkatesh to reconsider the ethical implications of his research.

Senior officers in J.T.'s gang responsible for security and finances, respectively. Price is known for his physical presence, while T-Bone wishes to return to college one day.

A former pimp and hustler turned community leader studying Criminal Justice. He provides Venkatesh with advice and insights from his experiences growing up in the projects.

Officers with contrasting approaches to policing in Robert Taylor Homes, illustrating different facets of law enforcement. Reggie is known for mediation, while Jerry is involved in corruption.