How does the character animation work?

Hey everybody, I'm messing around with the FPS Sample and i wanted to try and use my own character models. Im pretty confused on how the animations work though. There is no animation controller to be found and I was assuming that it was based on some sort of pre-rigged bone structure but I cant really figure it out. Can anybody help me understand how they are going about animating the models, and how i would try to use my own?
thanks so much!

 

did you saw
https://github.com/Unity-Technologies/FPSSample/blob/master/Documentation/Characters.md

and

https://github.com/Unity-Technologies/FPSSample/blob/master/Documentation/Animation.md

i managed some little changes
and tried to make some tests with FinalIK , PuppetMaster and UMA 2. Needs time.