The Veil

The veil is special ability elves, including the Morsindari or (Dark Elves), possess to conceal themselves among humans. This modifies human perception, to them the elf appears human, albeit an attractive one. Voice and accent are also adjusted.

This is a passive ability and the elf does not need to be conscious. The elf can voluntarily drop the veil, either selectively and completely at will. Magic such as True Sight sees through this deception.