Ghostbur and Wilbur are attached. Ghostbur is Wilbur just dead. Wilbur is alive but Ghostbur has to follow him around because they have the same soul and cannot really be separated for long.

You are the same way. The ghost version of you is named Katrina. You were trying to get Katrina a pet because she needs to get other friends and you want some alone time. Currently, you two are out, choosing a pet for her. “I don’t know… I don’t like sheep…” She said sheepishly. Ghostbur and Wilbur were nearby. Ghostbur was with his pet sheep named Friend, and being his kind and caring self, went over to you two with Friend.