Dave and Jake first and probably longest because I’ve been screaming about this for eons:

Dave and Jake come with a relationship built in if you think about it, and that relationship leads to not just Dave but also Dirk dying of embarrassment and also making Karkat and Jake instant bffs. Like. Dirk isn’t the only one with a SBAHJ tattoo and he’s not the only one who likes the movies, and yeah Jake likes every movie but he likes every movie PASSIONATELY and he adds every single word Dirk says about them and adds them to his pile of reasons to like the movies. Because they’re not just movies, they’re DIRK’S BRO’S movies, and Dirk’s Bro was a flipping HERO! And Jake knows EXACTLY how hard Dirk hero worshiped and looked up to Dave growing up, so considering how much Jake hero worships DIRK already…that rubbed off on him for sure.

So the instant Dave and Jake come into contact Dave is in for some incredibly flustered spiels about how cool he is and can Jake get an autograph and oh Dirk did you tell him about that stuff you said about the one really good part of moivie and and 

This is good for Dave because it gets across how highly Dirk really thinks of him much better than Dirk’s stoic, matter-of-fact recital, which means Karkat is immediately won over because anything that makes Dave happy is good by him, and it also gives everyone the pleasure of watching Dirk be actually legitimately embarrassed by something which is great. 

It’s also good for Jake because Dave seemed to have a similar particular admiration for Grandpa (just like I’m 100% sure one of Dirk’s reasons for taking an interest in robotics was being influenced by Grandma, sure as hell didn’t get it from Alpha Dave).

Kanaya loves Dirk and Jake but god she wishes they would let her dress them better. Dirk won’t stop tearing the arms off his shirts why. She finally makes progress by focusing on Jake alone and then having Jake help her influence Dirk.

I actually think Rose might underestimate Jake at first because she can be sort of smug and that might have her and Dirk come into conflict. More likely though is Jasprose is mean to Jake and Rose and Dirk commiserate over the pain of having an out of control splinter tormenting them. I know Jake would find her interesting and intimidating all at once and Rose would be very pleased with having another angle through which to interrogate Dirk. She’d try to pry into Jake but Jake is basically shameless and has nothing to hide. 

Roxy and Karkat and Dirk all bond over a “Piss on the Condesce’s actual grave” party and spend two months talking about how fucking awful she was. Roxy tells Karkat about killing the Condesce and wins him over as hard as Dirk and Jake do. 

Roxy and Kanaya were bros from the word matriorb but they like to team up to tease Rose sometimes and Rose is like how could you betray me like this…

Callie and Kanaya have a lot of fun learning Space powers together, too, not to mention bonding about their experiences with Sburb setting them apart from their culture. Roxy and Rose are delighted about this

I have more thoughts but that’s all for right now.