Who's the thot thought following them? I'm getting stalking vibes

I think it’s that guy who was secretly writing a manga about him.

It’s not lol from the raws I could tell that they’re different people but it still doesn’t show who he is ╥﹏╥

Is that one guy with the white hair. He’s found in the one of the chapters were honni decided to stream n he also was in another one but I forgot which one he it seems like he knew honni in the past