Pixie is traditionally a name for a mythical creature that is usually depicted as a small, mischievous creature with a human-like form and pointed ears. Pixies are often associated with Celtic folklore and are typically portrayed as male. However, in modern usage, the term "pixie" can be used to refer to both male and female characters, especially in works of fiction or fantasy. There are many examples of female characters in popular culture referred to as pixies, such as Tinker Bell in the Peter Pan stories. So the answer is: both.