The Roommate

Freshman student in Los Angeles who hopes to form a new circle of friends. She is trusting and hopeful, but increasingly wary as Rebecca's fixation grows and she confronts the darker boundaries of roommate dynamics. Sara values friendship and independence, and ultimately asserts her own safety.

Sara's wealthy but shy roommate whose obsession with Sara drives the violence and manipulation. She rewrites events to isolate Sara and presents a fake sense of loyalty while pursuing total access to her friend. Her behavior escalates from possessive to deadly.

Party-loving friend who becomes a target of Rebecca's jealousy. She faces a brutal attack and is forced to relocate dorms, illustrating the consequences of Rebecca's boundary-pushing behavior. Tracy's presence highlights the fragility of campus friendships.

Sara's love interest and supportive ally who tries to help her navigate the mounting threats. He provides steady presence and helps Sara realize the extent of Rebecca's delusion. He acts as a protective friend and partner in crisis.

An old friend who invites Sara to move in, only to become entangled in Rebecca's schemes. Irene is drawn into the danger as Rebecca seduces her and manipulates the situation to isolate Sara. Her experience shows how quickly trusted relationships can be corrupted.

Sara's ex-boyfriend who reaches out in hopes of reconciliation. Rebecca interferes by disguising herself as Sara and fatally stabbing Jason, marking a turning point in the crisis. His death underscores the lethal reach of obsession.

Sara's fashion design professor who is targeted by Rebecca as part of her plan to remove obstacles to Sara's companionship. Rebecca seduces him and records their interaction to feign a sexual assault, highlighting the power dynamics in the academic setting.