Ok scenario if Red successfully marked Mc, Mc didn't know what a mark is but when explained they started to scratch the mark yelling they didn't want this and even if they need to burn the mark off they don't care getridofitgetridofit- How would the others react to that?
Well at that point not a lot of the skeletons would actually be around her, Mutt would've gotten her out and into the safety of her own room. The only other skeleton likely to be there would be Papyrus and/or Blue.
And unfortunately, there's not much any of them can do. They'd just have to try and calm her down and get to accept the mark for now, because those marks run deep. Nothing can get them off and no amount of scratching or burning will help the situation. All that would do is hurt Mc and agitate Red to the point he may actually loose himself to his instincts for a while, going into a protective frenzy at what his instincts perceive as a threat to the life of his mate. But he'd mostly just be uncomfortable and agitated, upset by Mc's volatile whirlwind of emotions.
Mutt would definitely be upset by the reaction, he doesn't like seeing Mc so upset. It hurts him to see her like that, but there's not much they can do. So he'll just have to comfort her. Blue, Papyrus, Stretch, and San mostly would just feel pity and bad for her, they really can't imagine what that'd be like. They don't really want to know either. But Blue and Papyrus would try to comfort her as well.
Edge is just conflicted. He knows this isn't something anyone should have to go through, no matter how bad they might be. So he feels bad for her, but this is also negatively affecting his brother in a way he really doesn't like so he wishes she'd just calm down. Black doesn't really feel any particular way, he does feel a bit bad for her. She's obviously very distressed and unhappy, but he's more concerned with how it affects Mutt.





