I wondered about his eyes too. At one point, someone suggested that those could be his eyebrows, but if so, where are his eyes?
If he's wearing a silicone mask under his Covid type mask, I'm still wondering -- why are the eyes so close together? Could the mask be too small, or his face be thinner than it appears to be? For him to see out of such a mask, wouldn't his eyes have to be in the same place as the mask's eye holes?
After seeing your post, like many, I wondered whether his belly is real. It looks real to me -- I know guys with a similar build -- but who knows. One thing that has confused me is that he seems thinner in some photos than in others. That could just be camera angles or aspect ratios. (A variable size doesn't make sense in terms either of a real belly or a fake belly, unless it's fake and he can put things in it. That seems unlikely, but who knows.)
If he's lighter than he appears to be, that might explain his ease in movement and running, but then again, one can be both fit and heavy.
If he's wearing a silicone mask and/or a fake belly, I would expect that he might try to adjust them at some point. (But I don't know for sure, as I've never worn such things.) In any event, I haven't seen him do that on the publicly accessible videos.
ETA: And yes, I also wonder about the PIP (Person in Proximity). If they are a close associate of the POI, they could also be in disguise, which might explain some of their contradictory-seeming characteristics.
JMO