Sally Wilson is a 16-year-old girl who has recently moved away from her friends and family to a new, isolated house in the middle of nowhere. She feels trapped and seeks adventure to discover new things. The document describes her as having brown, medium-length hair and being around 5'8" tall. Her innocent and virgin-like appearance is meant to portray her as weak and vulnerable, but the writer wants to challenge this perception and show her as curious and intelligent instead.