Lydia Carlton

Lydia Carlton has the rare power to see fairies, an ability she inherited from her mother. She ends up working for Edgar as his consultant on fairy-related matters after helping him retrieve the Merrow's Sword (key to him being recognized as the Blue Knight Earl by the Queen of England). Her goal is to become a full-fledged fairy doctor, and frequently places herself in danger willingly when it comes to anything to do with problems between humans and fairies.