In Greek mythology nymphs are "divine spirits who animate nature, and are usually depicted as beautiful, young nubile maidens who love to dance and sing", and they also represented sexual freedom.
But these days nymphs typically represent the ancient ways and that free spirited beauty known as Mother Nature, serving as caretakers of the wilderness who cast a spell on curious mortal souls.
However, in this animated short entitled The Nymph and The Well by Sara E. Cardona there are no mortals to be found, just a caring nymph, the guardian of a well and a dance number.