Mein
From Changling the Dreaming Wiki
A Changeling's Mein is their fae or Chimeral aspect. It reflects their physical appearance to those with Kenning and the abilities they have when interacting with Chimera and things of the Dreaming.
The Mein can be used to interact with the Autumn World as well as long as no mortals are present to disbelieve it's effects. However, "calling upon the Wyrd", as well as certain Merits and Flaws, can cause a Changeling's Mein to be palpable to mortals.
Note: See also Voile.