Who is Cindy from My Bloody Life: The Making of a Latin King and what is their importance?

Cindy was a young girl from Chinatown. Reymundo called her Chinita. Determined to get a college education, Cindy continuously tried to convince her brother and Reymundo to leave the gang. Although Cindy and Reymundo were never romantically involved, Cindy's arguments about the hopelessness and inequalities of gang life stuck with him throughout his life.