Curupira is a male supernatural being from Brazil's folklore.
It originates from the Tupi indian mithology and he usually takes the form of a boy with (literally) flaming hair and green teeth.
 

His most startling characteristic, however, is that his feet are turned to face backwards.
 

To protect the forest from the destructive habits of man, he happily tolerates those who hunt for food but is infuriated by those who hunt for the pleasure of it and will lay traps and confuse them so that they become eternally lost in the forest. His backward feet, for example, have the effect of confusing hunters who may try to follow his tracks.
In addition, he has a super speed, that human eye is unable to follow.