The series stars Emma Myers — who plays Wednesday Addams ’ werewolf roommate, Enid Sinclair , in Wednesday — as a 17-year-old Pip as she investigates the murder of a high school student who was killed five years prior. Here's a breakdown of the cast and where you might have seen them before: Have you started watching A Good Girl's Guide to Murder on Netflix yet? Let us know what you think of the show in the comments!.