This is from my Rivertail book, she's called a Nilf....


Nilfs are small little creatures that look like a cross between a plant and a fairy, only places that are peaceful have Nilfs. They help gardens grow, but if your not careful and keep an eye on the little things you’ll find your garden taking over your house. Nilfs and Elves are usually together. We sing to the Nilfs and they come to us and make the trees and other plants grow the way we wish. This way we don’t have to harm the trees and it also makes it easier to hide from unwanted visitors.
(Exert From Rivertail)