Lucy Dark

Lucy Dark is the main character from the 8th Goosebump book The Girl Who Cried Monster.

History
Lucy is known to be a bit of a liar, such as telling fake scary stories, even one where she told her little brother about monsters living in the trees, around the corner and even once made up a story about a razor tooth toe biter living in the bushe. When Randy didn't believe her she tried to "prove" it by sticking her left foot in the bush and gave a huge scream, claming the biter ate her toe and caused Randy to scream to the house, telling the mom that Lucy's toes are gone,only to have her return to the house barefooted and revealed her toes were never eaten.

Later when she went to the library, because she's part of a reading program called "Reading Rangers" and  ask the Librarian for monster books like Mary Shelly's Frankenstien. One day when she came to the library she made a disovery that Mr. Mortman is actually a monster as she saw him transform into one while eating bugs.