Why do ghost appear like the face of your sister?

Ghosts may appear as familiar figures, like a sister's face, due to the psychological phenomenon known as pareidolia, where the mind interprets vague stimuli as recognizable patterns. Additionally, this could reflect the emotional connections and memories associated with that person, making their likeness more comforting or impactful during a haunting experience. In folklore and spirituality, it’s also believed that spirits may take familiar forms to communicate or evoke specific emotions in the living.