• Import the Ghost Cat Mood Lamp.unitypackage in your Unity Project.
  Go the the folder Assets/!Lysbell/Cat Mood Lamp and drag either the Write Defaults on or Write Defaults off Prefab on your model based on what you mostly use on your Avatar. If you're unsure what to use just try the WD On variant first and if something seems off try the WD off variant.

-Expand the Ghost Cat Mood Lamp Object in your Heirarchy, then expand "Follower" as well.
-Important: Drag out the "Follower Target" and put it on your Armature where you prefer it.
Personally we always put it on our Hips, since then the Cat will perfectly move with you if you sit down.

-Move the Object "Follower Target" to position the cat in your desired spot next to your Avatar.
You can rotate it left or right to adjust the base look direction of the Ghost Cat.

That's it! With Modular Avatar the Cat will automatically be installed on your Avatar on Uploading and you have a new Menu Button to control the Ghost Cat Mood Lamp.