Iara, a mythological creature from Brazilian Folklore, is a freshwater mermaid with a warrior's origin story.  Once the fiercest warrior in her father's tribe, Iara's two brother's grew envious of her and tried to kill her...ultimately failing. Iara, having killed her two brothers in self-defense was then sentenced to death herself, and as her body submerged into the river, the spirit of the Amazon River brought her back to life in the form of a mermaid.

Curupira, a mythological creature from Brazilian Folklore.  He lives in the forests of Brazil.  Curupira is known to have fire red hair and feet turned backwards.  His footprints lead to his starting point often confusing hunters and poachers.  Curupira is also able to create illusions, and create a high-pitched whistle that is known to drive his victims mad.  Above all, Curupira is a protector of the forest known for attacking hunters who go after animals taking care of their offsprings.  Curupira also doesn't have time for you if you're greedy and take more than what you need from the forest. 

Boto-cor-de-Rosa | Pink Amazon River Dolphin, a mythological creature from Brazilian Folklore.  It's believed that the (Pink) Amazon River Dolphin transforms into an attractive man in the evenings, going to nearby villages and seducing the ladies.  While in human form, he wears all white and a hat to hide his dolphin blowhole that remains intact in his human form.

Mula sem Cabeça |  The Headless Mule, a mythological creature from Brazilian Folklore, is a woman that has been cursed by God for her sins (i.e. fornicating  with a priest in church) and condemned to turn into a fire-spewing headless mule, galloping through the countryside.

Boitatá, a mythological creature from Brazilian Folklore, is a giant fiery serpent that supposedly survived the a great deluge by eating the eyes of animals and corpses alike.