Arlin Froll is a young girl about age 12 in the City of Ember. She has white-blond hair, usually tied in a braid. Arlin is short, a delicate-looking girl and is an expert. She is a tourguide of the Pipeworks and gives Doon a tour of the Pipeworks. This character can be read in Chapter 3-Under Ember on pages 41-45 in the first book of Ember.