Merri the Prank Caller/Origin

Origin
Merry-san is an urban legend about a young girl who threw away a foreign-made doll called "Merry" when she moved residences. That night, she got a phone call, "I'm Merry-san. I'm in the rubbish dump...", and then the call cuts off, before she calls again, "I'm Merry-san... I'm at the corner of the street, at the tobacco store..." The next call has Merry saying, "I'm Merry-san, I'm in front of your house". The young girl goes to the front door and opens it, but there's no-one there. As soon as she thinks this is just another prank, there's another call, "I'm Merry-san. I'm right behind you."