A pixie (also pixy, pixi, pizkie, piskie and pigsie as it is sometimes known in Cornwall) is a mythical creature of British folklore. Pixies are considered to be particularly concentrated in the high moorland areas around Devon and Cornwall, suggesting some Celtic origin for the belief and name.
Akin to the Irish and Scottish Aos Sí, pixies are believed to inhabit ancient underground ancestor sites such as stone circles, barrows, dolmens, ringforts or menhirs. In traditional regional lore, pixies are generally benign, mischievous, short of stature and childlike; they are fond of dancing and gather outdoors in huge numbers to dance or sometimes wrestle, through the night, demonstrating parallels with the Cornish plen-an-gwary and Breton Fest Noz (Cornish: troyl) folk celebrations originating in the medieval period.
In modern era, they are usually depicted with pointed ears, and often wearing a green outfit and pointed hat although traditional stories describe them wearing dirty ragged bundles of rags which they happily discard for gifts of new clothes.
Sometimes their eyes are described as being pointed upwards at the temple ends. These, however, are Victorian era conventions and not part of the older mythology.
https://en.wikipedia.org/wiki/Pixie