Suze Simon is a fictional character from the popular book series The Mediator by Meg Cabot. She is a teenage girl who has the unique ability to see and communicate with ghosts. Suze often finds herself in challenging situations as she helps spirits resolve their unfinished business while navigating her own life as a high school student. In addition to her ghostly encounters, Suze is known for her strong personality and determination. She lives in California with her stepbrother, Jesse, who is also a ghost. The series explores themes of friendship, love, and the supernatural, making Suze a relatable and engaging character for readers.