Foreman Clyde: He is put in charge of the Lockwood siblings. He is a man in his late 30s who has a government job. He is careless and likes to drink a lot. He takes pleasure at casual misfortune. He gets irrationally angry at loud chewing noises. This glutton will do anything to the children if it can get him more food and drink. Under his care they are constantly pulling dangerous stunts. He forces them into crazy schemes for him.

Blake Lockwood: Blake is a girl who is fifteen years old. Blake is very resourceful and has an interest in engineering. Her mechanical interest allows her to get out of some tough situations. Her experience with authority is to be suspicious. Whenever she tries to tell an adult something important, they never believe her. She has to do a lot of work to get them to trust her, and when they do, it is often too late

Chris Lockwood: Chris is a boy who is 13 years old. Chris is more gullible than his older sister. He is more willing to give authority the benefit of the doubt. This usually ends badly for him. He is very interested in researching various subjects. Once something gets his attention he develops a fixation for it. It has helped him out of tough situations. He is able to memorize many random factoids.