He's yet to see any trolls not from Alternia or Beforus, let alone one unrelated to the teams who played. But so many humans, especially unrelated to the Earths he knew of, is downright bizarre. Maybe it's because the world itself seems to be some alternate Earth. Humans in charge would go after more of their kind, right? But then why be so specific about a less usual species? It doesn't make much sense to him.

He lets her ruffle of feathers go without comment. Yes, Nill, you are a chick with wings. He didn't mean it badly at least. Human but a little different will work too; he chalks it up to a difference in universe.

He nods to her now. "Nill, okay. And yeah, I'm Karkat, surname Vantas. But if you mean the steaming load of horseshit that is confining even the resident nocturnal species to their district floors at night, then yes, I was told about that too."