Lettie Hempstock is a character from Neil Gaiman's novel, "The Ocean at the End of the Lane." She is depicted as a young girl with a mysterious and otherworldly presence. Lettie lives on a farm with her mother and grandmother, who are also portrayed as having unique abilities. Lettie befriends the protagonist, a nameless boy, and guides him through a series of supernatural events. She is known for her bravery and wisdom, often helping him confront dark forces. Her character embodies themes of childhood innocence and the complexities of memory and reality.