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The climax unfolds in a vivid showdown with the key demon, which manipulates individuals’ fears and primeval emotions. Elise faces her father's spirit, challenging the memories of abuse that crafted her lifelong fear. This surreal encounter serves to highlight her growth—transforming from a victim to a combatant against her past.
Elise's niece, Morgan, also reveals her inherited psychic abilities, adding layers to the family legacy and solidarity in the face of horrors. As Elise fights for liberation and closure, the film cleverly connects back to themes present in previous Insidious installments, reinforcing the cyclical nature of trauma and evil within the family unit.