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Maya's younger sister who lives across the country but maintains regular contact through video calls and texts. She's a nurse who recognizes the signs of psychological distress but struggles to help from a distance. Her persistent attempts to reach Maya become increasingly desperate as the entity manipulates Maya into cutting off contact.

A psychiatrist who specializes in urban isolation and has unknowingly documented several cases of entity possession in her research on city-induced psychological disorders. She represents the rational world that cannot comprehend the supernatural threat Maya faces, making her both a potential ally and a barrier to understanding the true danger.

A 28-year-old graphic designer who moved to Millbrook after escaping an abusive relationship. She chose isolation as protection but unknowingly made herself the perfect prey for an entity that feeds on loneliness. Her professional skills in visual design make her especially sensitive to the subtle changes in her reflection as the entity begins its takeover.