Implement simple deform physic for 2d character

I’m trying to implement logic like in this gif:
git

But unfortunate I can not apply this to a character class

I tried to follow this manual: https://www.youtube.com/watch?v=LwnDh8u5sGU

But stacked after creating of the Flesh Component, I tried to make skeleton of my own, create all 1 by 1 but for some reasons I can not apply it to the Paper Character.

Maybe there are simpler way to add such a physic interaction?