you are welcome to write fanfictions with cats of your own invention or from the books. If you are caught using somebody else's rp character without permission, you will be in trouble!
To roleplay, go to a territory page and post a comment about your cat doing something. Wait for someone to respond, then respond back!
Make another catEdit
You are anything but limited to having only one cat. Heck, have a hundred, I don't care!