His friends seemed to have treated it in with a sort of don’t ask don’t tell kind of attitude. Like, Karkat’s blood color is wrong and mutant in troll society, but they didn’t want to hurt Karkat because of it, in anyway. Even beyond the obvious killing reaction that many could assume his friends wouldn’t do, none of them did anything at all, like demand he step down from being the leader or something. They didn’t try to change anything at all.
By the same token, though, they didn’t really comfort him about it. Besides Terezi, none of his friends talked about his blood to Karkat directly. No words of comfort, no ‘I don’t want to kill you’ or anything. It was like, as long as Karkat didn’t bring it up and kept hiding behind grey, nobody else wanted to bring it up and mess up whatever tenuous social order they had going.
Of course, a major factor in how this was handled probably had to do with how everyone found out. Karkat didn’t tell anyone his blood color directly, and kept pretending no one knew. The other trolls presumably found out by seeing dead alternate Karkats in dream bubbles during or immediately after the game. So not only was the timing really inconvenient (most of them weren’t going to bring something like blood color up in the middle of the apocalypse), but they didn’t actually see alpha Karkat bleeding. There was no defining moment of ‘hey Karkat’s bleeding, I can see his blood right there, guess I can’t just ignore it.’ They could ignore it, and they did.
I want to know what Karkat’s friends would have done if they found out some other way, like if Karkat told them (would he ever tell someone by choice) or if they saw him bleeding in person.
I think about this a fuck ton actually