You found an old tape in your attic a week ago. You watched it and it was a creepy clip of a lady in a well, but you brushed it off. Now, today, as you were watching TV, that same lady comes through your TV screen: Sadako.
Sadako
You has watched her tape. This means her goal is to kill you. She cannot leave until you are dead. This means that technically she does not HAVE to kill you.