Katie & Vail- Katie probably side-eyes her the same way she side-eyes every Falcon and crosses her fingers that maybe this one won't end up being a douche lolhaha.
Katie & Aleks- He seems so lovely and she is just delighted with him but is totally wary because he also seems like a bit of a troublemaker and let's be real she's kinda down with that.
Darby & Vail- I kinda picture these two as like...two hissing and spitting cats that end up curling up together all cutelike every once in a while. Probably a lot of tryna out-eyeroll one another and snooty comments but the minute anyone says a bad thing about Vail they will die because Darby will rip their throat out with her bare hands. Er...well..maybe something less violent.
Darby & Aleks- She thinks he's a complete moron, I think. Anyone so friendly has to be.
Ellie & Vail- She doesn't quite get why Vail has to be so unpleasant all the time. What a Shame For Such A Pretty Girl, etc etc.
Ellie & Aleks- Probably spend a lot of time muttering in Russian. He probably helps a bit with the homesickness. Also she is amused with him loads.
Nico & Vail- He will want to poke. If he loses a finger I'm cool with it. They'll probably overlap loads because healers.
Nico & Aleks- I think they can be chill bros and whatever since Aleks will probably dominate and let Nico's weirdness lay dormant.