Paul's step-daughter and Sophie's older sister. Initially dismisses the entity Diana as imaginary until finding scratched evidence and medical records. She temporarily shelters her half-brother Martin, stages an intervention with her boyfriend Bret, and survives multiple attacks. Ultimately attempts to rescue her mother before Sophie sacrifices herself to destroy the entity.
Rebecca acts as a protective older sister to Martin, stepping in when their mother becomes unstable.
A strained mother-daughter relationship complicated by Sophie's untreated mental health issues and past abandonment.
Bret supports Rebecca emotionally and physically as they confront the supernatural threat.
Rebecca faces direct physical threats from Diana as she investigates the entity's origins.
Explore the full interactive character relationship map of Lights Out