He’s Ba-ack
Kids have pretty wild imaginations. The cardboard box that came with your refrigerator could be an entire universe to a child. However, it’d be nice if their imaginations didn’t involve concocting demonic figures that lurk in the shadows and are unseen by anyone except young children.
The good news is that talk of the mysterious man-like creature had died down for a few months. The bad news is that the man came back, and the kid could still see him. So, did the OP move houses, or did they get an exorcist to cleanse the property?