Real-time physics simulation sample of inhomogeneous structure

The solution to the following problems:

The problem of incorrect real-time positioning of multiple characters
The problem of hitbox penetration in real-time computation for multiple characters
The problem of real-time physical operation of spring and damping interaction between muscles and fat in multiple characters.
Model customed from Noelle designed by Vamtimbo
Mocap of girl is based on work of Kittymocap