They are the good, the bad, and the almost irrelevant. They are the miscellaneous characters that are there to answer that one question or to give that good (or bad) advice.
"A being with special powers born of one of the Realms of Power. One of the Highborn's parents must come from a Realm of Power. Highborn's are broken down into two classes; Purebloods and Falsebloods."
Lowborns[]
"A derogatory term used for humans. Lowborns possess no Highborn blood and very rarely possess magical or supernatural abilities."
The old girl is one of Pan's victims. Most of the people in her town were drained of their youth and died of old age far before their time. As far as can be seen, she did not get turned into one of the Zombie like Lost Boys. She was only sixteen at the time of her death. She stumbled onto Anna and Braden's camp just before she died.