A Fairlie is a human with an unusal ability. They got their name for a joke of them being "Fairly Human." Amanda Lockhart and Jessica Lockhart are both Fairlies. Also in Shell Game, a new girl named Mattie Weaver is known to be a Fairlie.
Every Fairlie has a different power. Amanda can levitate almost anything, Jess can dream the future, as seen in Disney at Dawn, and Mattie has the ability to feel the emotions, thoughts, and memories of whoever she touches.