Of all the beings I came across, the Dakini is probably one of the hardest to describe because they have their own versions in Tibetan Buddhism, Japanese Buddhism and Hinduism and they’re not exactly supernatural beings. Enlightened meditation practitioners can be called dakini, but Dakini is also a philosophical concept of the enlightened feminine form.
“As the Western nun Jetsunma Tenzin Palmo comments, “Many lamas have said that women make superior practitioners because they are able to dive into meditation much more easily than males. This is because many males are afraid of dropping the intellect, especially monks who have been studying for a long time. To suddenly just let that go and be naked in the meditation experience is frightening for them, whereas women seem to be able to manage it naturally.” from http://www.dakinipower.com/what-is-a-dakini/