She is voiced by Amandla Stenberg.
Bia is very intelligent, the smartest of her siblings. She is polite, well mannered, kind-hearted, and dreamy. She seems to have a closer relationship with her father than with her mother. Bia doesn't like her possessions being taken away, glaring at Tiago (somewhat amusingly) when he takes her book from her.
Bia loves to learn and is a bit of a know-it-all. She enjoys randomly saying facts, like the nutrition information she sees in a recipe book or while examining a larva in the jungle. Gentle and tame-natured like Blu, Bia is very sweet, though she isn't timid like him and enjoys thriving in the Amazon. She is shown to be interested in and love animals, reading about and saying facts on them.
Bia is smart like her father, always with a book in her wings and quick to spit out facts and figures. But when she gets to the Amazon, she is inspired by its awe and wonder. For once, she puts down her books and experiences the colorful life around her.