Dryad

Dryads are similar enough to Nymphs, except where Nymphs tend to be luxurious, Dryads are playful and mischievous. Dryads will steal things and cast minor spells to bespell and enchant targets, not to harm them but merely to entice the targets to play with them. Apparently Dryads have a very broad (and annoying) sense of fun...
References:
-http://www.bing.com/images/search?q=dryad&FORM=HDRSC2