Talon Angler: A young boy in the downside. After he meets Lindsay, he gets into big trouble. But he still wants to be together with Lindsay.
Lindsay Matthais: A young girl in the topside. She falls in love with Talon.
Gutta: a downside girl who likes Railborn, but she knows they can’t be together
Railborn Skitter: A boy in the downside who can do everything for Gutta. But he hate everything in the topside.
The Champ: A mysterious old man who is very clever. And he knows everything about the Downside. He is the intermediary between the downside and the topside. Besides, he helps Talon a lot.
Alfred Ely Beach: The people who discovered and built the downside. He is a inventor.