How to make flexible body?

Hi, I wonder how to make flexible body like below picture, please see it.

This picture is from ‘Dead or Alive’ It doesn’t seem vertex animation. entire body parts are effected by gravity and collision. For a long time, I’m searching for ‘soft-body in UE4’ and I found ‘Soft-body by Tendr’ but that plugins is still test version. I haven’t got a clue :frowning:
Please give me any idea to imitate below pic in Unreal Engine 4.

Only i think this can be done is to use an application like MakeHuman or something that makes breast or SOFTBODY in the way its reacts only when its affected…

otherway for off my top of head theory would be use the FBX from UE$ or a rigg that works for maya or 3ds max and then add bones to maybe spine01 02? then remake a “PONYTAIL” but with the weighting of the breast etc softbody…

only other thing would be some sorta physics based on a mesh that would have to be hardcoded…

Hope you find solution would open up alot of things for UE4

Idea: make a static mesh that acts like fat (thick water, water simulation or like slime in shell) and attach it to the body with virtual bone. The bone hinders it to fall down while it is affected from physics like gravity and can have real-time collision.