Sprites

There are several distinct types of sprite; Dryads, Nymphs and Sylphs. The dryad is a tree spirit, the Nymph a water spirit and the Sylph an air or wind spirit. When first encountered sprites often take on a form similar to that of an elf or pixie. But they are insubstantial beings and have no solidity in the world of humans.

Cornelius Clifford, at the Sign of the Singing Duck