Belle with the others stared at the door that Greed had closed. They had made sure to check outside to see no one which was why one couldn't help but wonder who was trying to create mischief or fear.
"It is probably one of the reapers," suggested Belle as she remembered how they could pop in and out of a place without much trouble. Obviously, the hellhounds couldn't knock the door because they didn't have the kind of hands that needed to knock.
"Is someone going to open it?" asked Barron, staring at the door like the rest of them.
"Are we?" asked Belle because if it was really the Grims then she hoped that no one would be dragged back to the land of the dead. They waited for the door to knock again and it did after a few minutes later, when they thought whatever it was had given up.