>>288559238
I renamed the parent bone to "Head" but CATS still isn't finding it. Could it be because the head and body are two separate meshes? Both were ripped as .glTF and imported. 

>>288559238
>>288559139
The model is Gran from GBVS, an Arcsys game. They really REALLY like their cloth physics. I'm sure it's compatible because there's a tutorial on another character in the same game where someone got it all working. The problem is this is the first time I've picked up Blender and I have no idea which bones to merge with which.