Never met the other two. From everything I heard about Vriska, though, I got the feeling she wasn't the type you wanted to run into or spend time with. Sorry you had to deal with her.

That's a pretty legit assessment of Karkat, though. Really what you've gotta do is keep him as far away from the topic of romance as is theoretically possible, because the guy hasn't got a clue how to rein it in when it comes to quadrant talk, and he has the most embarrasingly godawful taste in romcoms of anybody I've ever met.