( Pictures took from the movie itself )
Lina, whose imagination was as wide as the sky. She was always dreaming of the outside world and do sketches about them. She is fast, eager, inquisitive,very loyal, and she is also very loving.
Doon Harrow is Lina Mayfleet's best friend and is also from Ember. Doon is very knowledgeable in mechanics, and knows more than most others in the two cities, and practically on earth. Like Lina, he is very intelligent, and likes adventure. While in Ember, he loved to explore the city, keeping a journal full of information about bugs he found.