Fey
From AmtWiki
A type of Monster.
From the Rulebook
These are fairy folk. They are not immune to Bardic Charm(Control magic cast by Bard), but are immune to other forms of Control magic.
Stuff to know
The terrain effect Sacred Groves grants all Fey creatures, except Deep Dweller Elf, who enter may use the Camouflage ability once per life, so long as they remain within the grove.