Who is Celaya from Caramelo, or, Puro Cuento: A Novel and what is their importance?

Known best for her inability to keep a secret, Celaya is the only daughter in her family and is the youngest. She is constantly picked on for being the baby and for being her father's favorite. As a young girl she is very brave and curious, though once she grows into her teenage years, she grows into an awkward girl with her father's big nose and her mother's square body. She is also taller than everyone in her class, and life becomes unbearable the way only a teenage girl would find it.