An 18-year-old live-in nanny with a dark past. She manipulates the family, causes the neighbor boy's death, seduces Jeff, and violently attacks the household before being stopped by the police.
Mrs. Welford holds the key to Joanna's violent past as her former caregiver.
Scotty becomes Joanna's first fatal victim, highlighting her escalating ruthlessness.
Jeff is the nominal employer of Joanna, though he is initially unaware of her manipulative nature.
Explore the full interactive character relationship map of The Babysitter