Toby Daye is a fictional character from the urban fantasy series created by author Seanan McGuire. She is a half-fae private investigator living in a world where magic and mythical creatures exist alongside humans. The series follows her adventures as she navigates the complexities of both the fae and human realms. The first book in the series, titled Rosemary and Rue, introduces Toby as she is drawn into a mystery involving the fae community. Throughout the series, she faces various challenges, including political intrigue and personal struggles, while uncovering secrets that impact her life and those around her.