Javiera Batista is a pre-made Sim from the neighborhood of Isla Paradiso, available in The Sims 3: Island Paradise. She lives alone in Science Island and works as an Aquatic Ecosystem Tweaker in the Science career. Javiera has 8 points in Logic, 5 in Gardening and 3 in Handiness skills.
In the describtion of her household it is mentioned that her eyes twinkle "with a touch of madness", which may be a reference to her having the hidden trait Pyromaniac.
The name Javiera is a Spanish name. It means: owns a new house. People with this name have a deep inner need for quiet, and a desire to understand and analyze the world they live in, and to learn the deeper truths. This is true for Javiera, living on her own on a small island.
The name Batista also has a Latin origin. It is a Spanish or Portuguese surname, literally meaning "baptise". It could also mean "to dip" or "baptist".