Split personality disorder, clinically known as Dissociative Identity Disorder (DID), has fascinated both medical professionals and horror enthusiasts alike due to its complex nature and psychological depth. This condition is marked by the presence of two or more distinct personality states or identities within a single individual, which can dramatically alter behavior, memories, and perception. The phrase noted in the article, "YOU REALISE HER DOCUMENTED IDENTITIES MATCH," highlights a key aspect of DID — the existence of multiple identities that are well-established and documented, each with its own distinct traits and memories. This often confuses family members and medical practitioners, but it also adds a layer of intrigue and suspense to horror storytelling where characters experience internal conflict and external manifestations of these identities. Schizophrenia, often mistaken for DID, is a separate psychiatric disorder characterized by distorted thinking, hallucinations, and impaired emotional response. In the context of horror, schizophrenia can be portrayed to emphasize the terrifying aspects of the mind — where the real and the unreal blur, and sleepwalking incidents add another disturbing dimension. Sleepwalking itself is a parasomnia that involves performing activities while in a state between sleep and wakefulness. When combined with dissociative or psychotic disorders in horror narratives, it exacerbates the sense of loss of control and vulnerability. Understanding these conditions beyond their horror stereotypes fosters empathy and awareness. It is important to note that while such mental health issues are used to create suspense and fear in fictional works, they represent real challenges for individuals who face stigma and misconceptions daily. This exploration underscores the importance of sensitive and informed portrayals in media, encouraging audiences to look beyond the scary facade and comprehend the human reality beneath.