Little magic based shits. They pester EVERYONE. Their towns are isolated in the forests.
They are known to do good and evil, like when they launched a war against The Lucy Empire during their invasion of Davenstone that got 12 other countries in on it.
They do all kinds of stuff.
There are many groups and races and occupations of fairies, like tooth fairies, bone fairies, organ fairies, cute forest fairies that live in quaint villages and wage wars against rival villages and genocide, children teeth are the foundation of their economy or maybe not.