These vampires take on a humanoid appearance, much like normal humans with the exception of their pointy ears and ability to fly. They've so far only appeared as females with long slender bodies and clothing that often exposes much of their skin, such as their chest, neck and legs.
Flight: Leannan sí has the ability to hover in the air and travel over long distances, much like the capabilities of humans way of walking. It's unknown whether or not this requires magic or if it simply comes naturally to them.
Intangibility: is the ability to pass through physical matter.