An excerpt from the eNotes character page:
"...There is Esperanza's own family: her kind father who works two jobs and is absent most of the time, her mother who can speak two languages and sing opera but never finished high school, her two brothers Carlos and Kiki, and her little sister Nenny."
If you want to read more details about these characters, or other characters outside of the family, you should go to the character page, the link for which is provided below.
She has a kind father, a mother and her siblings, Carlos, Kiki, Nenny.
For a quicker, but briefer understanding of the book, refer to the link below, but if you need details, please refer to the link above.