Yeah, you’re right. And I don’t think there was an autispice (or however you spell it) available for them. I don’t think they were HEARTS, and while there was aggression…I don’t think it was hateful enough for SPADES. So Maybe DIAMONDS? But I couldn’t think how exactly they balanced each other out exactly.

But in all honesty, I also wouldn’t mind it if it was a strictly platonic relationship between the two of them. And whatever they were to each other, it was strong enough to make Karkat cry over his death.