So are we calling this OG mugo or 4th mugo but technically he should be 1st mugo

I would say OG because he seems to be the core one to me, or the one they all come from or are connected to

The imagining of them all looking 3D and them all freaking out over the same thing makes me think its a uniform version. Prebroken? They all agreed to protect him. Something of the sort? ?

i think hes og, the one who suffered in that jar