Cassidy

Cassidy is one of the murdered children and one of the strongest spirits connected to William Afton. Unlike the other children, Cassidy refuses to let William's actions be forgotten. Her anger keeps her spirit attached to the events surrounding the original murders, and she becomes particularly focused on William himself. Cassidy's role is defined by her refusal to move on. While Charlotte seeks to protect the other victims, Cassidy becomes consumed by the desire to make William suffer for what he has done. Her presence represents the lasting consequences of William's actions. Even when he believes he has escaped death, Cassidy remains a reminder that the people he hurt have not simply disappeared.