A cleanser of the soul and a peace-bringer.
Only when the dry seed cases pop.
In fruit orchards and vineyards.
Thanks to lorelei_aisling for the linkage. Oh, and the testy thingy is here: http://www.whiteelephant.ndo.co.uk/fairies/
(Although it's really only a test if you're 4 years old or younger. Any older and, well, let's just hope you can pass it.)
Note: It says your magic fairy's name... i.e. for all those people out there, that's the name of your magic fairy, not your name if you were a magic fairy. I could use some soul cleansing, and some peace bringing. And a beaver for my bat.