"I'm the author and I'm smart, looks at the body cam"
No, the smart thing would be that the girl would have record the conversation about her giving the stuff she must say to made the streamer look good.
This is the first series I'm rooting at the bad guys, Bora is an idiot.
There's a method to the madness. First off, Bora is out for a vengeance quite blatantly. She just wants to beat her up.
Secondly, with the attack on stream it shows that the narrative that the bully was trying to build was shattered. They are not friends.
Thirdly, with the body cam there will be footage of her trying to collude with Bora to being down the other bully. That's outright character assassination if this is being streamed, shared later, or used as blackmail.
I do think that Bora's violent tendencies is being built up to be her undoing. I get the feeling that Sena is more afraid of her sister than of the bullying given their interaction. And this is the third time she went against the plan for violence.