Dakini

A dakini (; Chinese language: 空行女) may be understood to refer to a minor goddess or female deity. In the Tibetan language the Sanskrit term dakini is rendered Khandroma (mkha’-‘gro-ma) meaning “she who traverses the sky” or “she who moves in space”; this is sometimes rendered poetically as "sky dancer" or "sky walker". Iconographically, their bodies are depicted curved in sinuous dance poses. They dance as they are active manifestations of energy or shakti. It should be noted that while dakinis are often depicted as beautiful and naked, they are not viewed primarily as sexual symbols but as symbols of the naked or natural mind or rigpa stripped of all obscuration and defilements. And the movements of their dance signify the movements and thoughts or the quanta of consciousness in the mindstream and the dharmakaya as the wellspring of the spontaneously emerging Buddha-mind, or rigpa.
See more at Wikipedia.org...

[Other] A Tibetan supernatural creature, a patron goddess of the Buddhistic doctrine. Dakinis are usually represented as naked young women with animal heads or masks who fly through the sky. Their nudity symbolizes the naked truth. 

Dakini (Sanskrit) Female demons, vampires, and blood-drinkers, feeding on human flesh, attendant upon Kali, the consort of Siva; a type of evil elemental. Outside of mythologic explanations, the dakinis may be said to be one type of advanced elemental beings. "But with the Fourth Race we reach the purely human period. Those who were hitherto semi-divine Beings, self-imprisoned in bodies which were human only in appearance, became physiologically changed and took unto themselves wives who were entirely human and fair to look at, but in whom lower, more material, though sidereal, beings had incarnated. These beings in female forms (Lilith is the prototype of these in the Jewish traditions) are called in the esoteric accounts 'Khado' (Dakini, in Sanskrit). Allegorical legends call the chief of these Liliths, Sangye Khado (Buddha Dakini, in Sanskrit); all are credited with the art of 'walking in the air,' and the greatest kindness to mortals; but no mind -- only animal instinct" (SD 2:284-5). See also Lilith