Additional Bones Question and Animation Reusage

Currently I have a model A with cape and long hair(Tpose), also with an attacking animation.

I made this Tpose the main skeleton of all other Tpose is gonna use.

Then I created another model B which only has long hair and no cape at all, then i used main skeleton Tpose From the model A, which now it won't have the cape movement(because you never see the cape), everything else seems to work just fine...

My question is that model C I remove both hair and cape just regular normal humanoid would still work.. I asume.. That means all then I have to do i just create animations for model A, and I will never have to create animation for model B and C.. as long as all their skeleton are right.


Am I right on this?

Thanks