I stepped back because they scared me and I was in the midst of telling them to leave her alone when I turned to see one of the creatures standing on the gramophone and starting it up . Answered my " what did they listen to ? " question ... it was playing Gekka No Yasoukyoku ! ( or however you spell it ! )

Question: Why is the narrator startled by this sudden guest ?
Answer: The guest is a monster .The guest is a criminal .The guest is a robber .The guest is a lion .