She arrived at the Sanctuary in 2006. She is the sister of Carlos, Claudio and Vitor, but she never met them because she was sold to the circus as a baby.

She is a large and dominant female with a strong personality. She has a habit of walking upright quite frequently, especially to show her size and intimidate others. She likes to wear clothes and makes a kind of skirt with fabrics to walk around the enclosure. She lives with the chimpanzee Martin and, despite her temperamental nature, Monica knows how to respect him.